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Home My WebLink AboutCC 2016-06-28_10b Urban Water Management Plan Update Attachment 1Final Draft 2015 Urban Water Management Plan for the City of Arroyo Grande Prepared by 6/22/2016 ATTACHMENT 1 City of Arroyo Grande Table of Contents 2015 Urban Water Management Plan - Final Draft i TABLE OF CONTENTS Table of Contents ........................................................................................................................................... i List of Tables ................................................................................................................................................ iv List of Figures ................................................................................................................................................ v List of Terms and Acronyms ......................................................................................................................... vi 1 Introduction and overview................................................................................................................. 1-1 2 Plan Preparation ................................................................................................................................ 2-1 2.1 Coordination .............................................................................................................................. 2-2 2.2 Plan Adoption, Submittal, and Implementation ........................................................................ 2-4 2.3 Relationship of the UWMP to Other Planning Efforts ............................................................... 2-4 2.4 Data Sources .............................................................................................................................. 2-5 3 System Description ............................................................................................................................ 3-1 3.1 Service Area Description and Boundaries .................................................................................. 3-1 3.2 Service Area Climate .................................................................................................................. 3-4 3.3 Service Area Population and Demographics .............................................................................. 3-5 4 System Demands ................................................................................................................................ 4-1 4.1 Baselines and Targets ................................................................................................................ 4-1 4.1.1 Baseline Water Use ........................................................................................................ 4-1 4.1.2 Target Water Use ........................................................................................................... 4-3 4.1.3 Minimum Water Use Reduction Requirement .............................................................. 4-5 4.1.4 Summary of Baseline and Target Water Use ................................................................. 4-5 4.2 Water Demands ......................................................................................................................... 4-7 4.2.1 Low-Income Demands ................................................................................................... 4-9 4.2.2 Sales to Other Water Agencies .................................................................................... 4-10 4.2.3 Additional Water Uses and Losses ............................................................................... 4-10 4.2.4 Total Water Use ........................................................................................................... 4-10 4.3 Wholesale Water Demand ....................................................................................................... 4-11 4.4 Water Use Reduction Plan ....................................................................................................... 4-11 5 System Supplies ................................................................................................................................. 5-1 5.1 Water Supply Sources ................................................................................................................ 5-1 5.1.1 Water Supply Facilities ................................................................................................... 5-1 City of Arroyo Grande Table of Contents 2015 Urban Water Management Plan - Final Draft ii 5.1.2 Current and Projected Water Sources ........................................................................... 5-1 5.2 Groundwater .............................................................................................................................. 5-4 5.2.1 Pismo Formation ............................................................................................................ 5-4 5.2.2 Santa Maria Groundwater Basin .................................................................................... 5-4 5.2.3 Groundwater Management Plan ................................................................................... 5-7 5.2.4 Groundwater Levels and Historical Trends .................................................................... 5-9 5.2.5 Groundwater Overdraft ............................................................................................... 5-10 5.2.6 Existing and Projected Groundwater Pumping ............................................................ 5-10 5.3 Transfer Opportunities ............................................................................................................. 5-11 5.4 Desalinated Water Opportunities ............................................................................................ 5-12 5.5 Recycled Water Opportunities ................................................................................................. 5-12 5.5.1 Wastewater Treatment Facilities ................................................................................. 5-12 5.5.2 Wastewater Flow Projections ...................................................................................... 5-13 5.5.3 Water Recycling Facilities ............................................................................................ 5-13 5.5.4 Regional Recycled Water Opportunities ...................................................................... 5-15 5.6 Future Water Projects .............................................................................................................. 5-19 5.6.1 Lopez Reservoir Spillway Raising ................................................................................. 5-19 5.6.2 Supplemental State Project Water via the Coastal Branch and Lopez Pipelines ......... 5-20 5.6.3 Additional Stormwater Reclamation ............................................................................ 5-20 5.6.4 PG&E Desalinated Water ............................................................................................. 5-22 6 Water Supply Reliability ..................................................................................................................... 6-1 6.1 Supply Reliability by Source ....................................................................................................... 6-1 6.1.1 Lopez Reservoir .............................................................................................................. 6-1 6.1.2 Groundwater .................................................................................................................. 6-2 6.2 Supply Reliability - Historic and Future Conditions .................................................................... 6-2 6.2.1 Basis of Water Year Data ............................................................................................... 6-3 6.2.2 Projected Normal Year Supply/Demand ........................................................................ 6-4 6.2.3 Projected Single Dry Year Supply/Demand .................................................................... 6-4 6.2.4 Projected Multiple Dry Year Supply/Demand ................................................................ 6-5 6.2.5 Projected Minimum Three Year Supply ......................................................................... 6-5 6.2.6 Resource Maximization and Import Minimization ........................................................ 6-6 City of Arroyo Grande Table of Contents 2015 Urban Water Management Plan - Final Draft iii 6.2.7 Factors Affecting Supply Reliability ................................................................................ 6-6 7 Water Shortage Contingency Planning .............................................................................................. 7-1 7.1 Stages of Action and Reduction Objectives ............................................................................... 7-1 7.2 Actions during a Catastrophic Interruption ............................................................................... 7-3 7.3 Mandatory Prohibitions on Water Wasting ............................................................................... 7-5 7.4 Consumption Reduction Methods in Most Restrictive Stage .................................................... 7-5 7.5 Excessive Use Penalties .............................................................................................................. 7-5 7.6 Revenue and Expenditure Impacts/Measures to Overcome Impacts ....................................... 7-6 7.7 Water Conservation Ordinance ................................................................................................. 7-6 7.8 Reduction Measuring Mechanism ............................................................................................. 7-7 8 Demand Management Measures ...................................................................................................... 8-1 8.1 Demand management measures (DMMs) Implemented or Planned to be Implemented ....... 8-1 8.1.1 DMM – Water Waste Prevention .................................................................................. 8-1 8.1.2 DMM – Metering ........................................................................................................... 8-2 8.1.3 DMM – Conservation Pricing ......................................................................................... 8-2 8.1.4 DMM – Public Information Programs ............................................................................ 8-4 8.1.5 DMM – Water Loss Control............................................................................................ 8-4 8.1.6 DMM – Conservation Coordinator and Staffing Support .............................................. 8-5 8.2 Other Demand Management Measures .................................................................................... 8-5 8.2.1 Water Conservation Incentive Programs ....................................................................... 8-5 9 References ......................................................................................................................................... 9-1 Appendix A. DWR Checklist........................................................................................................................... A Appendix B. Notification and Outreach Materials ........................................................................................ B Appendix C. Letter of Adoption .................................................................................................................... C Appendix D. BASELINE DAILY PER CAPITA WATER USE AND TARGET WATER USE TM – REVISED DRAFT ... D Appendix E. AWWA Water Loss Audit .......................................................................................................... E Appendix F. Selected Figures from the NCMA 2015 Annual Monitoring Report ......................................... F Appendix G. SMGB Judgment and Gentlemen’s AGreement ...................................................................... G Appendix H. Water Conservation Ordinance ................................................................................................H City of Arroyo Grande List of Tables 2015 Urban Water Management Plan - Final Draft iv LIST OF TABLES Table 2-1. DWR Schedule ........................................................................................................................... 2-1 Table 2-2. Summary of Changes in the UWMP Act Since 2010 ................................................................. 2-1 Table 2-3. Agency Coordination ................................................................................................................. 2-2 Table 3-1. Precipitation and Evapotranspiration in the City of Arroyo Grande, Jan.-June ........................ 3-4 Table 3-2. Precipitation and Evapotranspiration in the City of Arroyo Grande, July-Dec & Annual ......... 3-4 Table 3-3. Projected Annual Compounding Growth Rates in the City of Arroyo Grande ......................... 3-5 Table 3-4. Projected Annual Population Growth in the City of Arroyo Grande......................................... 3-5 Table 4-1. Base Daily Per Capita Water Use – 10-year range .................................................................... 4-2 Table 4-2. Base Daily Per Capita Water Use - 5 year range ....................................................................... 4-2 Table 4-3. Daily Per Capita Water Use Target ............................................................................................ 4-5 Table 4-4. Baseline, Compliance, Interim Target, and Target Per Capita Water Use ................................ 4-6 Table 4-5. 2010 Water Deliveries, afy ........................................................................................................ 4-7 Table 4-6. 2015 Water Deliveries, afy ........................................................................................................ 4-8 Table 4-7. 2020 Water Deliveries, afy ........................................................................................................ 4-8 Table 4-8. 2025 & 2030 Water Deliveries, afy ........................................................................................... 4-9 Table 4-9. 2035 Deliveries, afy ................................................................................................................... 4-9 Table 4-10. Low-Income Water Deliveries, afy ........................................................................................ 4-10 Table 4-11. Sales to Other Water Agencies, afy ...................................................................................... 4-10 Table 4-12. Non-Revenue Water, afy....................................................................................................... 4-10 Table 4-13. Total Water Use, afy ............................................................................................................. 4-11 Table 4-14. Retail Agency Demand Projections Provided to Wholesale Suppliers.................................. 4-11 Table 5-1. Current and Projected Water Supplies ..................................................................................... 5-2 Table 5-2. Current and Projected Wholesale Water Supplies ................................................................... 5-2 Table 5-3. SMGB Division of Safe Yield ...................................................................................................... 5-3 Table 5-4. Lopez Treatment and Distribution System Contract Entitlements ........................................... 5-3 Table 5-5. Zone 3 Extended Drought Emergency Supply Options ............................................................ 5-8 Table 5-6. Historic Groundwater Pumping .............................................................................................. 5-11 Table 5-7. Projected Groundwater Pumping ........................................................................................... 5-11 Table 5-8. Wastewater Flow Projections ................................................................................................. 5-13 Table 5-9. Potential Recycled Water Use, afy .......................................................................................... 5-17 Table 5-10. 2010 UWMP Recycled Water Use Projected for 2015 and Actual 2015 Recycled Water Use, afy............................................................................................................................................................. 5-18 Table 5-11. Projected Recycled Water Use, afy ....................................................................................... 5-18 Table 5-12. Lopez Reservoir Spillway Raise Capacities and Yields ........................................................... 5-19 Table 6-1. Initial Prescribed Municipal Diversion Reduction Strategy Under the LRRP ............................ 6-1 Table 6-2. Initial Prescribed Downstream Release Reduction Strategy Under the LRRP .......................... 6-2 Table 6-3. Basis of Water Year Data........................................................................................................... 6-3 Table 6-4. Historical and Projected Water Supply Conditions ................................................................... 6-3 Table 6-5. Supply and Demand – Normal Year .......................................................................................... 6-4 Table 6-6. Supply and Demand Comparisons – Single Dry Year ................................................................ 6-4 City of Arroyo Grande List of Figures 2015 Urban Water Management Plan - Final Draft v Table 6-7. Supply and Demand Comparison - Multiple Dry Year Events .................................................. 6-5 Table 6-8. Three-Year Minimum Supply .................................................................................................... 6-5 Table 6-9 Factors Affecting Water Supply Reliability ................................................................................. 6-6 Table 7-1. Water Shortage Contingency - Rationing Stages ...................................................................... 7-1 Table 7-2. Water Shortage Contingency - Mandatory Prohibitions .......................................................... 7-5 Table 7-3. Water Shortage Contingency - Penalties and Charges ............................................................. 7-6 Table 8-1. Demand Management Measures ............................................................................................. 8-1 Table 8-2. Single Family Rate Structure ..................................................................................................... 8-3 Table 8-3. Multi-family Rate Structure ...................................................................................................... 8-3 Table 8-4. Non-residential Water Rates..................................................................................................... 8-3 Table 8-5. Base Fees for Meter Size ........................................................................................................... 8-3 Table 8-6. Cash for Grass Program Summary ............................................................................................ 8-5 Table 8-7. Water Efficient Washer Rebate Program Summary ................................................................. 8-6 Table 8-8. Smart Irrigation Controller and Sensor Program Summary ...................................................... 8-6 Table 8-9. 2004-2016 Plumbing Retrofit Summary ................................................................................... 8-6 Table 8-10. 2004-2016 Plumbing Replacements Summary by Plumbing Hardware Type ........................ 8-7 LIST OF FIGURES Figure 3-1. Vicinity Map ............................................................................................................................. 3-2 Figure 3-2. Service Area Map ..................................................................................................................... 3-3 Figure 3-3. City General Plan Land Use ...................................................................................................... 3-7 Figure 3-4. City Zoning Map ....................................................................................................................... 3-8 Figure 4-1. Historic Gross Water Use and Per Capita Water Use .............................................................. 4-3 Figure 4-2. Historical, Baseline, Targets, and Projected GPCDs ................................................................. 4-7 Figure 5-1. SMGB Boundaries and Management Areas (28) ..................................................................... 5-6 Figure 5-2. SSLOCSD and Pismo Beach WWTFs and Outfall .................................................................... 5-14 Figure 5-3. Stormwater Basins and Retention Systems ........................................................................... 5-21 City of Arroyo Grande List of Terms and Acronyms 2015 Urban Water Management Plan - Final Draft vi LIST OF TERMS AND ACRONYMS Acronym/Term Definition (#) Reference/source citation # that can be looked up in Section 9 af acre feet afy acre feet per year ATF Advanced Treatment Facility AWWA American Water Works Association BMP Best Management Practice CCWA Central Coast Water Authority CEQA California Environmental Quality Act CII Commercial, Industrial, and Institutional CIMIS California Irrigation Management Information System CUWCC California Urban Water Conservation Council CWC California Water Code DDW California Division of Drinking Water DMM Demand Management Measure DWR California Department of Water Resources EPA U.S. Environmental Protection Agency ETo evapotranspiration rate FAT Full Advanced Treatment GHG Green House Gas GIS Geographical Information System gpcd gallons per capita per day GPM gallons per minute HCF Hundred Cubic Feet HCP Habitat Conservation Plan HECW High efficiency clothes washer HET High efficiency toilet IRWMP Integrated Regional Water Management Plan ITP Independent Technical Panel LUE Land Use Element LRRP Low Reservoir Response Plan mgd million gallons per day MOU Memorandum of Understanding MSL mean sea level NCMA Northern Cities Management Area NRW non-revenue water OCSD Oceano Community Services District RGSP Regional Groundwater Sustainability Project RHNA Regional Housing Needs Assessment RWFPS Recycled Water Facilities Planning Study SB7 Guidebook Methodologies for Calculating Baseline and Compliance Urban Per Capita Water Use City of Arroyo Grande List of Terms and Acronyms 2015 Urban Water Management Plan - Final Draft vii Acronym/Term Definition SB7 Senate Bill x 7-7 SGMA Sustainable Groundwater Management Act SLOCOG San Luis Obispo Council of Governments SMGB Santa Maria Valley Groundwater Basin SOI Sphere of Influence SSLOCSD South San Luis Obispo County Sanitation District SWP California State Water Project SWRCB State Water Resources Control Board UWMP Urban Water Management Plan UWMP Act Urban Water Management Planning Act UWMP Guidebook Guidebook to Assist Water Suppliers in the Preparation of a 2010 Urban Water Management Plan WDR Waste Discharge Requirements WSCP Water Shortage Contingency Plan WSPDP Water Supply, Production and Delivery Plan WTP Water treatment plant WWTF Wastewater treatment facility WWTP wastewater treatment plant Zone 3 San Luis Obispo County Flood Control and Water Conservation District Zone 3 City of Arroyo Grande 1. Introduction and overview 2015 Urban Water Management Plan - Final Draft 1-1 1 INTRODUCTION AND OVERVIEW The California Water Code requires urban water suppliers within the state to prepare and adopt Urban Water Management Plans (UWMPs) for submission to the California Department of Water Resources (DWR). The UWMPs, which are required to be filed every five years, must satisfy the requirements of the Urban Water Management Planning Act (UWMP Act) of 1983 including amendments that have been made to the UWMP Act and other applicable regulations. The UWMP Act requires urban water suppliers servicing 3,000 or more connections, or supplying more than 3,000 acre-feet (af) of water annually, to prepare an UWMP. The purpose of the UWMP is for water suppliers to evaluate their long-term resource planning and establish management measures to ensure adequate water supplies are available to meet existing and future demands. The UWMP provides a framework to help water suppliers maintain efficient use of urban water supplies, continue to promote conservation programs and policies, ensure that sufficient water supplies are available for future beneficial use, and provide a mechanism for response during water drought conditions. The UWMP is a valuable planning tool used for multiple purposes including:  Serves as a valuable resource to the community and other interested parties regarding water supply and demand, conservation and other water related information  Meets a statutory requirement of the California Water Code  Provides a key source of information for Water Supply Assessments (WSAs) and Written Verifications of Water Supply  Supports regional long-range planning documents including City and County General Plans  Provides a standardized methodology for water utilities to assess their water resource needs and availability  Serves as a critical component of developing Integrated Regional Water Management Plans (IRWMPs)  Provides a resource for regional involvement in the California Water Plan This plan, which was prepared in compliance with the California Water Code, and as set forth in the 2015 guidelines and format established by the DWR, constitutes the City of Arroyo Grande’s (City) 2015 UWMP. City of Arroyo Grande 2. Plan Preparation 2015 Urban Water Management Plan - Final Draft 2-1 2 PLAN PREPARATION This plan was prepared based on guidance from DWR’s Guidebook to Assist Water Suppliers in the Preparation of a 2015 Urban Water Management Plan (UWMP Guidebook) (1), DWR Urban Water Management Plans Public Workshops and Webinars, Methodologies for Calculating Baseline and Compliance Urban Per Capita Water Use (SB7 Guidebook) (2), and the 2015 DWR Review Sheet Checklist (Appendix A). The 2015 UWMPs must be submitted to DWR by the water purveyors by July 1, 2016. Usually, UWMPs are due on December 31 of years ending in ‘0’ and ‘5’, but a six-month extension has been granted for submittal of the 2015 UWMPs. The draft 2015 UWMP Guidebook became available in November 2015 and was finalized in February 2016. DWR’s 2015 UWMP schedule is summarized in Table 2-1. Table 2-1. DWR Schedule Date Event/Task November, 2015 Draft Guidebook released December , 2015 Workshops January, 2016 Final Draft Guidebook released March, 2016 Final Guidebook, materials and tools released July, 2016 UWMPs due to DWR A DWR Review Sheet checklist is provided in Appendix A as a reference for the various sections within this UWMP that address the requirements of the UWMP Act. Table 2-2 summarizes changes to the UWMP Act since 2010 that have been addressed in this UWMP. Table 2-2. Summary of Changes in the UWMP Act Since 2010 Change CWC Section Legislative Bill Summary Demand Management Measures 10631 (f)(1) and (2) AB 2067, 2014 Requires water suppliers to provide narratives describing their water demand management measures, as provided. Requires retail water suppliers to address the nature and extent of each water demand management measure implemented over the past 5 years and describe the water demand management measures that the supplier plans to implement to achieve its water use targets. Submittal Date 10621 (d) AB 2067, 2014 Requires each urban water supplier to submit its 2015 plan to the Department of Water Resources by July 1, 2016. Electronic Submittal 10644 (a) (2) SB 1420, 2014 Requires the plan, or amendments to the plan, to be submitted electronically including any standardized forms, tables, or displays specified by the department. City of Arroyo Grande 2. Plan Preparation 2015 Urban Water Management Plan - Final Draft 2-2 Change CWC Section Legislative Bill Summary Standardized Forms 10644 (a) (2) SB 1420, 2014 Requires the plan, or amendments to the plan, to include any standardized forms, tables, or displays specified by the department. Water Loss 10631 (e) (1) (J) and (e) (3) (A) and (B) SB 1420, 2014 Requires a plan to quantify and report on distribution system water loss. Estimating Future Water Savings 10631 (e) (4) SB 1420, 2014 Provides for water use projections to display and account for the water savings estimated to result from adopted codes, standards, ordinances, or transportation and land use plans, when that information is available and applicable to an urban water supplier. Voluntary Reporting of Energy Intensity 10631.2 (a) and (b) SB 1036, 2014 Provides for an urban water supplier to include certain energy related information, including, but not limited to, an estimate of the amount of energy used to extract or divert water supplies. Defining Water Features 10632 AB 2409, 2010 Requires urban water suppliers to analyze and define water features that are artificially supplied with water, including ponds, lakes, waterfalls, and fountains, separately from swimming pools and spas. 2.1 COORDINATION To prepare this UWMP, the City coordinated with multiple neighboring and stakeholder agencies. The coordination efforts were conducted to: 1) inform the agencies of the City’s efforts and activities; 2) gather high quality data for use in developing this UWMP; and 3) coordinate planning activities with other related regional plans and initiatives. The coordination activities conducted by the City are summarized in Table 2-3. Table 2-3. Agency Coordination Agency/ Organization Pa r t i c i p a t e d in d e v e l o p i n g th e p l a n Co m m e n t e d on t h e d r a f t At t e n d e d pu b l i c me e t i n g s Wa s co n t a c t e d f o r as s i s t a n c e Wa s s e n t a co p y o f t h e dr a f t p l a n Wa s s e n t a no t i c e of in t e n t i o n t o ad o p t Avila Beach Community Services District X Avila Valley Mutual Water Company X California Department of Water Resources City of Arroyo Grande 2. Plan Preparation 2015 Urban Water Management Plan - Final Draft 2-3 Agency/ Organization Pa r t i c i p a t e d in d e v e l o p i n g th e p l a n Co m m e n t e d on t h e d r a f t At t e n d e d pu b l i c me e t i n g s Wa s co n t a c t e d f o r as s i s t a n c e Wa s s e n t a co p y o f t h e dr a f t p l a n Wa s s e n t a no t i c e of in t e n t i o n t o ad o p t California State Library City of Grover Beach X City Pismo Beach X County of San Luis Obispo X X County Service Area 12 X Nipomo Mesa Management Area Technical Group X Northern Cities Management Area Technical Group X Oceano Community Services District X Port San Luis Harbor District X San Luis Obispo Council of Governments X San Luis Obispo County Flood Control and Water Conservation District Zone 3 X X San Miguelito Mutual Water Company X South San Luis Obispo County Sanitation District X Table to be updated upon completion of each notification. City of Arroyo Grande 2. Plan Preparation 2015 Urban Water Management Plan - Final Draft 2-4 2.2 PLAN ADOPTION, SUBMITTAL, AND IMPLEMENTATION To fulfill the requirements of Water Code Section 10621(c), the City sent letters of notification of preparation of the 2015 UWMP to all neighboring cities and San Luis Obispo County 60 days prior to the public hearing. Copies of the 60-day notification letters are attached as Appendix B. To fulfill the requirements of Water Code Section 10642 of the UWMP Act, the City made the draft 2015 UWMP available for public review and held a public hearing on June 28, 2016. The public review hearing was noticed on June 14, 2016 and the hearing notice is attached in Appendix B. In addition, the City maintained a copy of the draft UWMP in its office prior to the public hearing. The Final 2015 UWMP was formally adopted by the City Council on June 28, 2016. A copy of the Adoption Resolution is included in Appendix C. A copy of the Final 2015 UWMP was sent to the California State Library, DWR (electronically using the WUEdata reporting tool), and other appropriate agencies within 30 days of adoption. The City will make the 2015 UWMP available for public review in its offices during normal hours no later than 30 days after the adoption of the plan by the City Council and filing with DWR. The implementation of this plan shall be carried out as described unless significant changes occur between the adoption of this plan and the 2020 plan. If such significant changes do occur, the City will amend and readopt the plan as required by the California Water Code. 2.3 RELATIONSHIP OF THE UWMP TO OTHER PLANNING EFFORTS The City has identified the need to obtain additional water to maintain a reliable supply portfolio. The Water Supply Alternatives Study was prepared in August 2004 to identify one or more short, intermediate, and long term supply alternatives that meet the City’s objectives for water quantity, quality, and reliability (3). The Water Supply Alternatives Study report was followed by other related water supply reports including the following: - Water Recycling Update Report, January 2009 (4) - South San Luis Obispo County Desalination Funding Study , October 2008 (5) - Supplemental Water Supply Study Nacimiento Pipeline Extension (6) - Capacity Evaluation of the Lopez Pipeline for Delivery of Additional State Water Project Supplies to the Northern Cities Technical Memorandum (7) - Memorandum: Lopez Reservoir Expansion- Spillway Raise Project Advisory Group Recommendations, January 2009 - Lopez Lake Spillway Raise Project Report, February 2013 (8) - San Luis Obispo County Regional Recycled Water Strategic Plan (9) - Recycled Water Facilities Planning Study for the City of Pismo Beach (10) - Diablo Canyon Power Plant Desalination Hydraulic Feasibility Analysis FINAL DRAFT – DCPP DESALINATION PIPELINE FEASIBILITY STUDY Technical Memorandum (11) - Water Balance Study for the Northern Cities Area, April 2007 (12) City of Arroyo Grande 2. Plan Preparation 2015 Urban Water Management Plan - Final Draft 2-5 The City Council reviewed the San Luis Obispo County Integrated Regional Water Management Plan (IRWMP), of which the City is a participant, on August 6, 2014 at its public meeting. The City is coordinating the preparation of the UWMP with this regional water planning effort. The UWMP serves as a critical component for developing the IRWMP and maintains consistency with the goals and policies of the IRWMP. The IRWMP provides an opportunity for the City to apply for state funding for planning or implementation of projects and enhances integration with regional, countywide, and statewide water resources planning strategies and policies. Through its involvement in the Northern Cities Management Area (NCMA), the City has reviewed and provided input on the County’s Master Water Report (13), including demand and supply projections developed prior to this UWMP. The City is beginning an update of the Agriculture, Conservation and Open Space Element of the General Plan, which will include goals and policies for the City’s water resources. The UWMP will provide information and background for this planning process. The City updated the Housing Element of its General Plan in early 2016. This UWMP is consistent with the information provided in the Housing Element. The City’s Wastewater System and Water System Master Plans were updated in 2013. This UWMP is prepared in concurrence with the master planning efforts and reflects consistent demand and supply data and methodologies. 2.4 DATA SOURCES This UWMP was prepared by compiling data from a variety of sources, including federal, state, and local government agencies, which are cited in Section 9. Documents concerning water management in the City and surrounding areas were used and are shown below: Information used to complete this report was compiled from a variety of sources, including: • Arroyo Grande Groundwater Basin Groundwater Management Agreement (see Appendix G) • Arroyo Grande Urban Water Management Plan 2005 Update, September 2010 • Arroyo Grande Urban Water Management Plan 2010 Update, June 2012 • Arroyo Grande Water Supply Alternatives, August 24, 2004 (3) • Capacity Evaluation of the Lopez Pipeline (7) • City of Arroyo Grande General Plan Housing Element (14) • City of Arroyo Grande General Plan Land Use Element (15) • City of Arroyo Grande Staff • City of Arroyo Grande Water Conservation and Emergency Water Shortage Restrictions, February 2015 (see Appendix H) • City of Arroyo Grande Water System Master Plan, December 2012 (16) • 2015 Urban Water Management Plans Guidebook for Urban Water Suppliers, March 2016 (17) City of Arroyo Grande 2. Plan Preparation 2015 Urban Water Management Plan - Final Draft 2-6 • Methodologies for Calculating Baseline and Compliance Urban Per Capita Water Use, February 2016 (18) • Recycled Water Distribution System Conceptual Plan (19) • Recycled Water Distribution System Conceptual Plan Technical Memorandum (20) • Regional Housing Needs Plan (21) • San Luis Obispo County 2040 Population, Housing & Employment Forecast (22) • San Luis Obispo County Flood Control and Water Conservation District Zone 3 Urban Water Management Plan 2010 Update (23) • San Luis Obispo County Master Water Report (13) • San Luis Obispo County 2014 Integrated Regional Water Management Plan (24) • Supplemental Water Supply Study Nacimiento Pipeline Extension (6) • Water and Wastewater Financial Plan and Rate Study (25) • Water Balance Study for the Northern Cities Area (26) • Water Recycling Update Report (4) • South San Luis Obispo County Desalination Funding Study , October 2008 (5) City of Arroyo Grande 3. System Description 2015 Urban Water Management Plan - Final Draft 3-1 3 SYSTEM DESCRIPTION 3.1 SERVICE AREA DESCRIPTION AND BOUNDARIES The City is located in the southern portion of San Luis Obispo County along the banks of the Arroyo Grande Creek. The Pacific Ocean lies approximately 1.5 miles to the west. The City is bordered by the City of Grover Beach to the west, the communities of Oceano and Halcyon to the southwest, Pismo Beach to the northwest and unincorporated portions of the County of San Luis Obispo to the north, northeast, and southeast (see Figure 3-1). The City, a general law entity, currently incorporates 5.87 square miles of land with primarily residential and agricultural land uses. The City’s distinctive character derives from its traditional ties to agriculture, physical diversity, unique village, small town atmosphere, and rural settings. The current (2015) population of the City is 17,731 based on California Department of Finance data; however, the City currently serves water to a population of 17,636 residents. The City’s water service area population includes residents of 9 water service connections outside of City limits and excludes residents of 138 connections served by Oceano Community Service District (OCSD) in an area located in the southwest portion of the City limits (see Figure 3-2). All 6,605 connections to the City’s water system are metered, and there are no agricultural or industrial connections. City of Arroyo Grande 3. System Description 2015 Urban Water Management Plan - Final Draft 3-2 Figure 3-1. Vicinity Map City of Arroyo Grande 3. System Description 2015 Urban Water Management Plan - Final Draft 3-3 Figure 3-2. Service Area Map City of Arroyo Grande 3. System Description 2015 Urban Water Management Plan - Final Draft 3-4 3.2 SERVICE AREA CLIMATE The climate of the City has a Mediterranean coastal climate with mild, dry summers and cool, wet winters. The annual precipitation is 16.14 inches, with the majority of the rain occurring during the months of January through March. Table 3-1 and Table 3-2 outline the climate characteristics for the City area based on average historical climate data. The normal year evapotranspiration rate (Eto) for the City is approximately 52 inches. The average annual temperature is 58 degrees Fahrenheit (°F). The City has mild weather year-round, with typically warm daytime temperatures and cool nighttime temperatures. The City does not have extreme seasonal variations, though the area is subject to normal weather fluctuations often experienced in marine environments. Table 3-1. Precipitation and Evapotranspiration in the City of Arroyo Grande, Jan.-June January February March April May June Standard Average Evapotranspiration (ETo), in1 2.21 2.5 3.8 5.08 5.7 6.19 Average Rainfall, in2 3.43 3.52 2.57 1.01 0.30 0.05 Average Temperature, °F3 52.94 54.4 55.21 56.86 58.17 60.32 1Data from California Irrigation Management Information System (CIMIS), Station 202 in Nipomo, (period of record is from January 2007 through June 2015) http://wwwcimis.water.ca.gov/UserControls/Reports/MonthlyReportViewer.aspx 2Average rainfall data from SLO County Public Works Volunteer Precipitation Gauge Station (AG Corp Yard #177.1) www.slocountywater.org/weather (years 1976 -2015) 3Data from Western Regional Climate Center, Station: Station: 046943 Pismo Beach (period of record 1949 to 2015). http://www.wrcc.dri.edu/CLIMATEDATA.html Table 3-2. Precipitation and Evapotranspiration in the City of Arroyo Grande, July-Dec & Annual July August Sept. Oct. Nov. Dec. Annual Standard Average ETo, in1 6.43 6.09 4.87 4.09 2.89 2.28 52.13 Average Rainfall, in2 0.05 0.00 0.09 0.74 1.61 2.71 16.08 Average Temperature, °F 3 61.28 62.09 62.48 61.15 57.55 53.7 57.8 1Data from California Irrigation Management Information System (CIMIS), Station 202 in Nipomo, (period of record is from January 2007 through June 2015) http://wwwcimis.water.ca.gov/cimis/data.jsp 2Average rainfall data from SLO County Public Works Volunteer Precipitation Gauge Station (AG Corp Yard #177.1) www.slocountywater.org/weather (years 1976 -2015) 3Data from Western Regional Climate Center, Station: Station: 046943 Pismo Beach (period of record 1949 to 2015). http://www.wrcc.dri.edu/CLIMATEDATA.html City of Arroyo Grande 3. System Description 2015 Urban Water Management Plan - Final Draft 3-5 3.3 SERVICE AREA POPULATION AND DEMOGRAPHICS The City is largely built-out and is expected to experience only modest growth over the next 20 years. The build-out population, defined as the maximum population that can occur considering the zoning and land use designations in the current General Plan, is established at 20,000 persons. The build-out population may increase if an annexation of approximately 185 acres of land and subsequent development were to occur on a portion of land that lies southeast of the City within the City’s Sphere of Influence. The land use development policies within the City are established in the City’s General Plan, principally by the Land Use Element (LUE) (15). The last comprehensive update to the General Plan occurred in October 2001, with the Housing Element updated in 2016. The City’s population within City Limits was 17,252 in 2010 according to the 2010 U.S. Census and 17,731 by the end of 2015 according to the California Department of Finance. The City does not serve water to the entire population within its City Limits. The OCSD serves a portion of the population in the southwestern part of the City. The City also serves some customers outside of the City Limits. To meet the requirements of Senate Bill x 7-7 (SB7), an estimate of the service area population was calculated in the Base Daily Per Capita Water Use and Target Water Use Technical Memorandum attached as Appendix D. Based on the methodology described in Appendix D, the service area population in 2010 was 16,908. The San Luis Obispo Council of Governments (SLOCOG) projects population for the City through 2040 in its San Luis Obispo County 2040 Population, Housing & Employment Forecast (22). The service area population projections are based on annual growth rates calculated from the mid growth scenario population projections from SLOCOG’s report (see Table 3-3). The annual growth rates are applied to the 2015 service area population to yield the projected service area populations shown in Table 3-4. Table 3-3. Projected Annual Compounding Growth Rates in the City of Arroyo Grande 2016-2020 2021-2025 2026-2030 2031-2035 Growth Rates1 0.99% 0.57% 0.69% 0.67% 1 Growth rates were calculated from SLOCOG population projection data, mid-range (22). Table 3-4. Projected Annual Population Growth in the City of Arroyo Grande 2010 2015 2020 2025 2030 2035 Service Area Population 16,908 17,636 18,524 19,054 19,716 20,000 City Population 17,252 17,731 18,624 19,157 19,822 20,000 City of Arroyo Grande 3. System Description 2015 Urban Water Management Plan - Final Draft 3-6 Existing land uses are shown on Figure 3-3 and existing zoning districts within the City are shown in Figure 3-4 below. Historically, most of the City’s residential growth has occurred on large lots and at low densities. However, it is anticipated that future growth will be redistributed to the City’s mixed-use and higher density residential areas. Based on project submittals over the past two years, as well as projected development, the recent and foreseeable trend for new residential development is in the form of higher density, mixed use infill and redevelopment, clustered subdivision, small-lot planned unit development and condominiums. City of Arroyo Grande 3. System Description 2015 Urban Water Management Plan - Final Draft 3-7 Figure 3-3. City General Plan Land Use City of Arroyo Grande 3. System Description 2015 Urban Water Management Plan - Final Draft 3-8 Figure 3-4. City Zoning Map City of Arroyo Grande 4. System Demands 2015 Urban Water Management Plan - Final Draft 4-1 4 SYSTEM DEMANDS 4.1 BASELINES AND TARGETS Senate Bill x 7-7 (SB7), also known as the Water Conservation Bill of 2009 (SB7), which was incorporated into the UWMP Act in 2009, requires that all water suppliers to increase water use efficiency with the overall goal to decrease per-capita water consumption within the state by 20 percent by the year 2020. SB7 required DWR to develop certain criteria, methods, and standard reporting forms through a public process that could be used by water suppliers to establish their baseline water use and determine their water conservation targets. SB7 and the SB7 Guidebook specify methodologies for determining the baseline water demand, 2015 interim urban water use target and the 2020 urban water use target for the City as described in the following sections. 4.1.1 Baseline Water Use The first step in developing the baseline water use for the City is determining the applicable range of years to calculate the baseline average. The UWMP Act stipulates an agency may use either a 10 or 15- year average to determine their baseline. If 10 percent of total urban retail water deliveries in 2008 were from recycled water, then the agency can use a 15-year average baseline if it chooses. The City does not currently have the infrastructure or treatment ability in place to recycle water, and therefore has not utilized recycled water in the past. For this reason, a 10-year average was used for baseline determination. The UWMP Act requires the use of a continuous 10-year range with the end of the range ending between December 31, 2004 and December 31, 2010 to determine the baseline. As shown in Table 4-1, the City’s selected 10-year base period begins in year 1999 and ends in year 2008. In addition to the 10-year baseline, a 5-year baseline is also calculated, which is used to establish the minimum criteria for the City’s use reduction targets. The UWMP Act requires the use of a continuous 5-year range with the end of the range ending between December 31, 2007 and December 31, 2010 to determine the baseline. As shown in Table 4-2, the City’s selected 5-year base period begins in year 2003 and ends in year 2007. The City’s historical gross water use and per capita water use for the period of 1995 through 2015 are shown in Figure 4-1. City of Arroyo Grande 4. System Demands 2015 Urban Water Management Plan - Final Draft 4-2 Table 4-1. Base Daily Per Capita Water Use – 10-year range Calendar Year Distribution System Population Daily System Gross Water Use (mgd) Annual Daily Per Capita Water Use (gpcd) 10 year running average 1995 14,951 2.3 157 1996 15,062 2.5 166 1997 15,173 2.8 182 1998 15,284 2.5 162 1999 15,396 2.8 184 2000 15,507 3.0 195 2001 15,647 2.9 188 2002 15,787 3.1 198 2003 15,927 3.1 197 2004 16,067 3.2 200 183 2005 16,208 3.0 188 186 2006 16,348 3.0 182 187 2007 16,488 3.2 194 189 2008 16,628 3.1 189 191 2009 16,768 2.9 173 190 2010 16,908 2.6 156 187 Base Daily Per Capita Water Use 191 Table 4-2. Base Daily Per Capita Water Use - 5 year range Calendar Year Distribution System Population Daily System Gross Water Use (mgd) Annual Daily Per Capita Water Use (gpcd) 5 year running average 2003 15,927 3.1 197 2004 16,067 3.2 200 2005 16,208 3.0 188 2006 16,348 3.0 182 2007 16,488 3.2 194 192 2008 16,628 3.1 189 190 2009 16,768 2.9 173 185 2010 16,908 2.6 156 179 Base Daily Per Capita Water Use 192 City of Arroyo Grande 4. System Demands 2015 Urban Water Management Plan - Final Draft 4-3 Figure 4-1. Historic Gross Water Use and Per Capita Water Use 4.1.2 Target Water Use DWR provided four different methods to establish water conservation targets. These four methods are summarized in the following sections. 4.1.2.1 Method 1 - Baseline Reduction Method The Method 1 2020 water conservation target is defined as a 20 percent reduction of average per-capita from the 10-year continuous baseline period. Based on the baseline daily per capita use of 191 gallons per capita per day (gpcd) determined previously, the target use for Method 1 is 153 gpcd. The 2015 interim water use target is simply the midpoint of the baseline and the 2020 water conservation target, or 172 gpcd for Method 1 in the City’s case. 4.1.2.2 Method 2 - Efficiency Standard Method The 2020 water conservation target of this method is determined by calculating efficiency standards for indoor use separately from outdoor use for residential sectors, and an overall reduction of 10 percent for commercial, industrial, and institutional (CII) sectors. The aggregated total of the efficiency standards in each area is then used to create a conservation target. Very few agencies within the State have the data necessary to determine a target water use using Method 2. It is not feasible for the City to use this methodology since the City lacks the detailed landscaped area estimates to calculate the landscaped area water use. 4.1.2.3 Method 3 - Hydrologic Region Method This method uses the ten regional urban water use targets for the state. Based on the water supplier’s location within these regions, a static water use conservation target for 2020 is assigned. 157 166 182 162 184 195 188 198 197 200 188 182 194 189 173 156 153 157 160 141 113 100 150 200 250 300 350 0 500 1000 1500 2000 2500 3000 3500 4000 19 9 5 19 9 6 19 9 7 19 9 8 19 9 9 20 0 0 20 0 1 20 0 2 20 0 3 20 0 4 20 0 5 20 0 6 20 0 7 20 0 8 20 0 9 20 1 0 20 1 1 20 1 2 20 1 3 20 1 4 20 1 5 Av e r a g e P e r C a p i t a W a t e r U s e ( g p c d ) Po p u l a t i o n Gross Water Use (afy)Average Per Capita Water Use (gpcd) City of Arroyo Grande 4. System Demands 2015 Urban Water Management Plan - Final Draft 4-4 Urban water use targets (2020 conservation goals) for the hydrologic regions in California is included in the UWMP Guidebook. To determine the target using Method 3, 95 percent of the region-specific conservation goal is calculated. Based on a 2020 target of 123 gpcd for the Central Coast region, the City’s Method 3 target is 117 gpcd for 2020. The City’s 2015 interim water use target for Method 3 is then calculated to be 120 gpcd. 4.1.2.4 Method 4 - BMP Based Method Method 4 identifies water savings obtained through identified practices and subtracts them from the baseline daily per capita water use value identified for the water supplier. The water savings identified that can be used to reduce the baseline daily per capita water use value include: • Indoor residential use savings; • Commercial, industrial, and institutional savings; • Landscape and water loss savings; and • Metered savings. The Method 4 per capita water use target was calculated using the City’s 10-year baseline period (1999 to 2008). A discussion of each of the savings components and the subsequent calculated savings specifically for the City is included below. • Indoor Residential Savings. Since indoor and outdoor water use is delivered through a single meter, an assumption of 70 gpcd has been provided by DWR for standard residential indoor water use. To determine indoor residential savings potential, the draft provisional method outlines two methodologies. First, a best management practices (BMP) calculator has been developed to sum the savings for four conservation elements including single and multi-family residential housing toilets, residential washers, and showerheads. The City will use what has been termed the “default option” to determine these savings. Based on the provisional method, this default value is 15 gpcd. • Commercial, Industrial, and Institutional Savings. Baseline CII water use can be established for the City based on data provided in the City’s DWR Public Water Systems Statistics Sheet for years 1999 to 2008. Based on this data, the baseline per capita CII water use is 21.8 gpcd. The draft provisional method estimates a default value for CII savings of 10 percent. The CII water savings are therefore 2.1 gpcd. • Landscape and Water Loss Savings. The landscape and water loss water use is determined by subtracting the default indoor water use of 70 gpcd and CII water use of 21.8 gpcd from the calculated years’ 1999 to 2008 baseline per capita use. Based on a 1999 to 2008 baseline per capita water use of 191.5 gpcd, the landscape and water loss use is 100.1 gpcd. The draft provisional method estimates a default value for landscape and water loss savings of 21.6 percent. The landscape and water loss savings are therefore 21.6 gpcd. City of Arroyo Grande 4. System Demands 2015 Urban Water Management Plan - Final Draft 4-5 • Metered Savings. Metered savings are considered in addition to the savings attributed to the three sectors previously discussed. Because the City was fully metered in the midpoint year of 2003 (based on the methodology established by DWR) and no unmetered deliveries occurred, the unmetered per capita use was zero gpcd. Therefore, no savings from metering was calculated. The City’s 2020 target water use is calculated as the baseline water use minus the total savings (residential indoor, CII, landscape, and water loss, and meter savings). In the City’s case, the total water savings accounts for 38.8 gpcd, which equates to a 2020 target water use of 152.7 gpcd in 2020, and a corresponding interim water use target for Method 4 of 172.1 gpcd in 2015. 4.1.3 Minimum Water Use Reduction Requirement The final step in determining the applicability of the water use target for the City is to confirm the water use targets meet the minimum reduction requirements as defined by DWR. To confirm the chosen 2020 per capita target, the 5-year average baseline previously determined Table 4-2 is used. The chosen target (calculated using one of the four methods described above) must be less than 95 percent of the 5- year baseline. In order to meet this minimum criteria, the City’s 2020 target per capita water use must be less than or equal to 183 gpcd. 4.1.4 Summary of Baseline and Target Water Use Based on the 2020 water use targets calculated using the four methodologies described previously, the urban water use target for the City is 153.2 gpcd. Using the 10-year baseline of 192 gpcd, the 2015 interim water use target is 172 gpcd. This target was determined using Method 1. According to the DWR guidelines, this target is valid since it is less than the minimum 5-year baseline target confirmation criteria of 183 gpcd. The baseline water use, target per capita use determined based on the four methods, and the compliance, selected target and interim target are summarized in Table 4-3 and Table 4-4. Table 4-3. Daily Per Capita Water Use Target Calculation Method Water Use Target (gpcd) Method 1: 80% of Baseline Per Capita Water Use 153.2 Method 2: Performance Standards Not calculated Method 3: 95% of Regional Target 117.0 Method 4: DWR Approach 152.7 Selected Urban Water Use Target 153.2 City of Arroyo Grande 4. System Demands 2015 Urban Water Management Plan - Final Draft 4-6 Table 4-4. Baseline, Compliance, Interim Target, and Target Per Capita Water Use Parameter Water Use (gpcd) Base Daily Per Capita Water Use 191 2015 Daily Per Capita Water Use 113 2015 Interim Urban Water Use Target 172 2020 Urban Water Use Target 153 Since 1996, the City’s per capita water use has varied. As shown in Figure 4-1, the City’s per capita water use in 2011, 2014 and 2015 was below the 2020 target. The declining trend in per capita water use from 2007 through 2015 is attributed to a combination of factors such as economic conditions, prolonged drought conditions, and State mandated conservation regulations. It is assumed that these factors have resulted in subsequent physical (e.g., turf replacement, water fixture replacement, etc.) and behavioral changes (e.g., irrigating less or quicker showers due to various media conservation campaigns and materials) in customer demand patterns associated with effective conservation programs. While physical conservation related changes result in essentially permanent demand reductions, behavioral changes may not yield permanent demand reductions. State mandated emergency water conservation regulations may have a short-term impact on demand reductions during drought conditions, but it is assumed that there will be a rebound to average demands due to customers’ behavioral changes over the long-term. By nature, the State mandated emergency regulations are temporary, but SB7 requirements are long-term. Therefore, for the purposes of projecting long-term water use, it is assumed that the 2020 gpcd will be approximately equal to the three-year historical average gpcd from 2013-2015, or 138 gpcd. The interim years between 2016 and 2019 were calculated through linear interpolation between the 2020 and 2015 water use. Lastly, the years following 2020 were assumed to stay the same through buildout. The assumed future 138 gpcd was applied to population projections shown in Table 3-4 to project demands from 2020 through 2035. Figure 4-2 displays the baseline and targets as well as historical and projected per capita water use. Based on Governor Brown’s Executive Order B-37-16, revised baselines, targets and/or water use reduction methodologies could be required in 2017. The State Water Resource Control Board (SWRCB), DWR, California Public Utilities Commission and the California Energy Commission will be developing an action plan to implement the Executive Order during 2016. It is anticipated that the implementation of the action plan will require legislative action to enact any new requirements. Depending on the outcome of the process, the City will respond accordingly to make any adjustments necessary to meet new requirements. City of Arroyo Grande 4. System Demands 2015 Urban Water Management Plan - Final Draft 4-7 Figure 4-2. Historical, Baseline, Targets, and Projected GPCDs 4.2 WATER DEMANDS The following tables (Table 4-5, Table 4-6, Table 4-7, Table 4-8, Table 4-9) show the past, current, and projected water deliveries for the City based on historical and projected population (Table 3-4) and per capita water use (Figure 4-1). Table 4-5. 2010 Water Deliveries, afy 2010 Metered Not Metered Total Water use sectors # of Connections Volume # of Connections Volume Volume Single family 5,801 2,031 0 0 2,031 Multi-family 107 278 0 0 278 Commercial 398 278 0 0 278 Industrial 0 0 0 0 0 Institutional/ governmental 49 84 0 0 84 Landscape 118 111 0 0 111 Agriculture 0 0 0 0 0 Other 0 0 0 0 0 Total 6,473 2,782 0 0 2,782 191 172 153 2013-2015 Average= 138 gpcd 138 100 120 140 160 180 200 220 19 9 6 19 9 8 20 0 0 20 0 2 20 0 4 20 0 6 20 0 8 20 1 0 20 1 2 20 1 4 20 1 6 20 1 8 20 2 0 20 2 2 20 2 4 20 2 6 20 2 8 20 3 0 20 3 2 20 3 4 Wa t e r U s e ( G a l l o n s / C a p i t a / D a y ) Baseline 2015 Interim Target 2020 Target Projected Use Historical Use City of Arroyo Grande 4. System Demands 2015 Urban Water Management Plan - Final Draft 4-8 Table 4-6. 2015 Water Deliveries, afy 2015 Metered Not Metered Total Water use sectors # of Connections Volume # of Connections Volume Volume Single family 5,907 1,517 0 0 1,517 Multi-family 109 190 0 0 190 Commercial 413 178 0 0 178 Industrial 0 0 0 0 0 Institutional/ governmental 51 53 0 0 53 Landscape 125 169 0 0 169 Agriculture 0 0 0 0 0 Other 0 0 0 0 0 Total 6,605 2,106 0 0 2,106 Table 4-7. 2020 Water Deliveries, afy 2020 Metered Not Metered Total Water use sectors # of Connections Volume # of Connections Volume Volume Single family 6,205 1,957 0 0 1,957 Multi-family 114 245 0 0 245 Commercial 434 230 0 0 230 Industrial 0 0 0 0 0 Institutional/ governmental 53 69 0 0 69 Landscape 131 217 0 0 217 Agriculture 0 0 0 0 0 Other 0 0 0 0 0 Total 6,938 2,718 0 0 2,718 City of Arroyo Grande 4. System Demands 2015 Urban Water Management Plan - Final Draft 4-9 Table 4-8. 2025 & 2030 Water Deliveries, afy 2025 2030 Metered Metered Water use sectors # of Connections Volume # of Connections Volume Single family 6,382 2,013 6,604 2,083 Multi-family 118 252 122 261 Commercial 446 236 462 245 Industrial 0 0 0 0 Institutional/ governmental 55 71 57 73 Landscape 135 224 140 231 Agriculture 0 0 0 0 Other 0 0 0 0 Total 7,136 2,796 7,384 2,893 Table 4-9. 2035 Deliveries, afy 2035 Metered Water use sectors # of Connections Volume Single family 6,828 2,113 Multi-family 126 264 Commercial 478 248 Industrial 0 0 Institutional/ governmental 59 74 Landscape 144 235 Agriculture 0 0 Other 0 0 Total 7,635 2,934 4.2.1 Low-Income Demands Changes to the California Water Code section 10631.1 since 2005 require demand projections to include projected water use for single-family and multi-family residential housing needed for lower income households. Low-income households are defined as households making less than 80% of statewide median household income. The Regional Housing Needs Assessment (RHNA) determines the housing needs in each jurisdiction over the planning period. SLCOG’s current RHNA planning period is from January 1, 2014, through June 30, 2019. For this planning period, ninety-eight (98) new low-income units are projected to be needed in the City by 2019 (21). Assuming the average water usage factor per connection in each respective year, the projected demand for the low-income residential units is shown in Table 4-10. The low-income deliveries projections are included in the City’s total projected water deliveries shown in Table 4-5 through Table 4-9. City of Arroyo Grande 4. System Demands 2015 Urban Water Management Plan - Final Draft 4-10 Table 4-10. Low-Income Water Deliveries, afy Low-income Water Demands 2014 2015 2016 2017 2018 2019 Residential 7.2 7.1 7.1 7.1 7.1 7.0 Cumulative Total 7.2 14.3 21.4 28.5 35.6 42.6 4.2.2 Sales to Other Water Agencies Although the City has emergency connections with Pismo Beach and Grover Beach to deliver water in emergencies, the City does not have any contracts to sell water to other agencies as a wholesaler. Additionally, the City does not plan to sell water to other agencies in the future. Table 4-11 shows the historical, current, and projected amounts of water provided to other agencies. Table 4-11. Sales to Other Water Agencies, afy Water distributed 2010 2015 2020 2025 2030 2035 N/A 0 0 0 0 0 0 Total 0 0 0 0 0 0 4.2.3 Additional Water Uses and Losses Table 4-12 shows the past, current and projected amount of non-revenue water (NRW) for the City. NRW is defined as the water losses plus authorized unbilled (metered and unmetered) water consumption. The City used the American Water Works Association (AWWA) Free Water Audit Software in 2015 to perform a water audit of the City for the one calendar year period of 2015 (Appendix E). NRW is projected to be approximately 5.2% of production going forward (2016-2035) based on the average NRW percentage for 2011-2015. Table 4-12 shows the historical and projected NRW for the City. Table 4-12. Non-Revenue Water, afy Water use 2010 2015 2020 2025 2030 2035 Non-revenue water (NRW) 173 133 150 154 159 161 Total 173 133 150 154 159 161 4.2.4 Total Water Use Table 4-13 shows the past, current, and projected total water use for the City. Total water use includes water delivered to customers, water sold to other agencies, and non-revenue water. City of Arroyo Grande 4. System Demands 2015 Urban Water Management Plan - Final Draft 4-11 Table 4-13. Total Water Use, afy Water Use 2010 2015 2020 2025 2030 2035 Total water deliveries 2,782 2,106 2,718 2,796 2,893 2,934 Sales to other water agencies 0 0 0 0 0 0 Non-revenue water (NRW) 173 133 150 154 159 161 Total 2,956 2,239 2,867 2,949 3,052 3,096 4.3 WHOLESALE WATER DEMAND The City receives wholesale water from the Lopez Project, managed by the San Luis Obispo County Flood Control and Water Conservation District Zone 3 (Zone 3) and temporarily received wholesale water from OCSD until 2012. The available supply from the Lopez Project and OCSD is discussed in Section 5 of this UWMP. The projected wholesale water demands for Zone 3 are shown Table 4-14. Table 4-14. Retail Agency Demand Projections Provided to Wholesale Suppliers Wholesaler Contracted Volume (afy) Water Use (afy) 2020 2025 2030 2035 Lopez Project 2,290 2,290 2,290 2,290 2,290 Total 2,290 2,290 2,290 2,290 2,290 4.4 WATER USE REDUCTION PLAN This City is committed to taking appropriate steps to reduce its water consumption to meet its 2020 target of 153 gpcd. In fact, conservation measures enacted by the City have already caused per capita consumption to drop below the 2020 target. As the City continues to implement water conservation measures and encourage water conservation practices within its customer base, the City will likely be able to continue to surpass its 2020 per capita water use target. City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-1 5 SYSTEM SUPPLIES 5.1 WATER SUPPLY SOURCES This section describes the existing and projected water supply sources for the City. The City has a variety of water sources including groundwater, local surface water, and storm water captured for groundwater recharge, irrigation and construction water. The City has completed multiple studies of potential supplemental water supply sources including an extension of the Nacimiento Pipeline, desalination, recycled water, and State Water Project water. These studies and other potential supply sources are discussed further in Sections 5.3 through 5.6. 5.1.1 Water Supply Facilities The City delivers both surface water and groundwater through its pressurized distribution system. The distribution system is composed of 88 miles of distribution mains, six storage reservoirs, six pumping stations, and 6,605 service connections. The City’s well system consists of eight wells, chloramination facilities, and an in-line static mixer for blending of well and surface water. Well No. 9 and No. 10 extract water from the Pismo Formation located outside of the NCMA boundary. Raw water from Well No. 9 and 10 receive treatment prior to entering into the system for iron/manganese and hydrogen sulfide. The City receives water from the Lopez Project, which includes the Lopez Reservoir, the Lopez Terminal Reservoir, the Lopez Water Treatment Plant and the Lopez Pipeline. All City potable water is treated to meet drinking water standards, regardless of the source of supply. Wastewater treatment is conducted by the South San Luis Obispo County Sanitation District (SSLOCSD) at their Regional Treatment Facility located in Oceano as discussed in Section 5.5.1. 5.1.2 Current and Projected Water Sources The City’s current and projected water supply sources are summarized in Table 5-1. The City’s projected water supply sources include local groundwater (Section 5.2) and the Lopez Project (Section 5.1.2.2). City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-2 Table 5-1. Current and Projected Water Supplies Water Supply Sources Projected Water Supply (afy) Water Source Wholesale Supplied Volume 2015 2020 2025 2030 2035 Lopez Project Yes 2,061 2,290 2,290 2,290 2,290 Groundwater-Santa Maria Valley Groundwater Basin No 1,323 1,323 1,323 1,323 1,323 Groundwater-Pismo Formation 1 No 160 200 200 200 200 Transfers In No 0 0 0 0 0 Exchanges In No 0 0 0 0 0 Recycled Water No 0 0 0 0 0 Desalinated Water No 0 0 0 0 0 Total 3,544 3,813 3,813 3,813 3,813 1 Assumes 80 afy of groundwater from Well No. 9, 80 afy from Well No. 10, and 40 afy from Well No. 11 will be available as a reliable source of supply from 2016 through 2030. Table 5-2. Current and Projected Wholesale Water Supplies Wholesale Sources Contracted Volume (afy) Projected Water Supply (afy) 2015 2020 2025 2030 2035 Lopez Project 1 2,290 2,061 2,290 2,290 2,290 2,290 Total 2,290 2,061 2,290 2,290 2,290 2,290 1 Normal contract amount was reduced by 10% in 2015 due to low reservoir levels, but the City utilized surplus water as described in Section 5.1.2.2. In the event of an emergency or need for stand-by water, the City has an emergency connection with the Cities of Pismo Beach and Grover Beach. 5.1.2.1 Groundwater The City currently extracts groundwater from the Arroyo Grande Plain of the Tri-Cities Mesa Subbasin (Subbasin) of the Santa Maria Valley Groundwater Basin (SMGB) and the Pismo Formation, which is separate from the SMGB. The SMGB is an adjudicated basin as described in further detail in Section 5.2. The City has an allocation of 1,323 afy of groundwater from the SMGB Sub-basin based on the Santa Maria Valley Water Conservation District vs. City of Santa Maria, et al. Case No. 770214 Judgment After Trial (Judgment) for the SMGB. Table 5-3 shows the parties and uses that are entitled to a portion of the safe yield of the SMGB. City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-3 Table 5-3. SMGB Division of Safe Yield Allocated Use Allocation Applied Irrigation 4,970 Subsurface Flow to Ocean 200 City of Arroyo Grande1 1,323 City of Grover Beach1 1,407 City of Pismo Beach 700 Oceano CSD 900 TOTAL 9,500 1 Per the Groundwater Management Agreement, the Cities of Arroyo Grande and Grover Beach have increased their entitlements by to 121 AFY and 209 AFY respectively based on the conversion of irrigated agricultural lands to urban use. 5.1.2.2 Lopez Project The Lopez Project, which is operated by San Luis Obispo County Flood Control and Water Conservation District (District) Zone 3 (Zone 3), is considered a very reliable source of water supply. The reservoir’s total capacity is 51,990 af with a storage capacity of 49,200 af. The annual safe yield of the reservoir is 8,730 afy with 4,530 afy apportioned to contract agencies and the remaining 4,200 afy reserved for downstream releases to maintain environmental and agricultural flows downstream. In years when less water is required to be released downstream in the Arroyo Grande Creek, additional water (known as surplus water) may be available to the Zone 3 member agencies, which include the Cities of Arroyo Grande, Grover Beach, Pismo Beach, the OCSD and County Service Area 12 (CSA 12). Storage at the end of 2015 was 13,847 af, or 28%, of total storage capacity. From the 4,530 afy of entitlements, the Lopez Project provides a contractual supply of 2,290 afy to the City, except for years when reservoir storage is below 15,000 af, such as 2015. More details about the reliability of the Lopez Project are described in Section 6.1.1 Table 5-4 shows the contracted entitlements for municipal users of the Lopez Project. Table 5-4. Lopez Treatment and Distribution System Contract Entitlements Water Contractor Lopez WTP Water Supply Annual Entitlement (AFY) Arroyo Grande 2,290 Oceano CSD 303 Grover Beach 800 Pismo Beach 896 CSA 12 Total 61 Avila Valley MWC Subtotal 12 San Miguelito MWC Subtotal 0 Avila Beach CSD Subtotal 68 Port San Luis Subtotal 100 Other CSA 12 Customers Subtotal 61 TOTAL 4,530 City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-4 5.2 GROUNDWATER This section describes the Pismo Formation and SMGB, two sources of groundwater, that underlie the City. 5.2.1 Pismo Formation The Pismo Formation is a distinct deep aquifer at the northeastern section of the City, identified in water wells along Oak Park Boulevard on the south, at Paseo Ladera Lane to the west, and along James Way to the east. Currently, the City pumps groundwater from Well No. 9 and Well No. 10, which are capable of extracting approximately 90 afy each if operated 100% of the time, but are assumed to extract 80 afy each assuming required operational downtime. Both wells receive treatment for iron, manganese and hydrogen sulfide prior to discharge into the system. Well No. 11 is assumed to be operational by the end of 2016. Well No. 11 is capable of extracting approximately 45 afy if operated 100% of the time, but is assumed to extract 40 afy assuming required operational downtime. Water supply from the Pismo Formation is not subject to the Judgment of the SMGB. The Pismo Formation is not adjudicated and has not been identified as over drafted or projected to be over drafted by DWR. In 2003, Cleath & Associates completed a groundwater source assessment for the Oak Park area, which covers the same aquifer as the Pismo Formation. The groundwater yield for the Oak Park area was estimated to be approximately 540 afy (27). The City exercises an appropriative right to put the water supply from the Pismo Formation to reasonable and beneficial use. The City’s appropriative right allows it to pump available groundwater surplus to the needs of all existing overlying rights in the basin. 5.2.2 Santa Maria Groundwater Basin The SMGB (DWR Bulletin 118 basin Number 3-12) underlies the Santa Maria Valley in the coastal portion of northern Santa Barbara and southern San Luis Obispo Counties. The SMGB also underlies Nipomo and Tri-Cities Mesa, Arroyo Grande Plain, and Arroyo Grande and Pismo Creek Valleys, of which the City draws from the Tri-Cities Mesa portion of the SMGB. The SMGB is bounded by the San Luis and Santa Lucia Ranges on the north, the San Rafael Mountains on the east, and Solomon Hills and San Antonio Creek Valley Groundwater Basin on the south, and the Pacific Ocean on the west. The SMGB is approximately 288 square miles (184,000 acres). The SMGB was adjudicated in 2008 and a map of the SMGB is included in Figure 5-1 and Appendix F. Groundwater is found in alluvium, sand dunes, and the Orcutt, Paso Robles, Pismo, and Careaga formations. Groundwater is unconfined throughout most of the SMGB except in the coastal portion where it is confined. Specific yield of sediments in the SMGB ranges from 3 to 21 percent, with a mean specific yield of approximately 12 percent for parts of the SMGB in San Luis Obispo County. City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-5 Natural recharge in the basin comes from seepage losses from major streams, percolation of rainfall, and subsurface flow. Percolation of flow in Pismo Creek provides recharge for the northern portion of the SMGB. Percolation of flow in Arroyo Grande Creek and other tributary flows to the creek provide recharge for the Tri-Cities Mesa, Arroyo Grande Plain, and Arroyo Grande Valley portions of the SMGB. Incidental recharge results from deep percolation of urban and agricultural return water and septic tank effluent. Some subsurface flow comes from consolidated rocks surrounding the SMGB and from the neighboring San Antonia Creek Valley Groundwater Basin. A 2007 Water Balance Study of the Northern Cities Management Area (described below) estimated a total average annual recharge of 8,535 afy, and an average annual groundwater production of 5,569 afy between 1986 and 2004. City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-6 Figure 5-1. SMGB Boundaries and Management Areas (28) City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-7 5.2.3 Groundwater Management Plan A formal groundwater management plan has not been prepared for the City or the SMGB. However, the SMGB, the basin in which the City has most of its groundwater production capacity, is adjudicated and pumping within the NCMA portions of the SMGB is managed based on the 2002 Management Agreement (Management Agreement), which was incorporated into the SMGB Judgment. A copy of the Judgment and Management Agreement are provided in Appendix G. As a requirement of the Judgment, the City participates in a Northern Cities Technical Group (NCMA TG), which is comprised of staff from each of the NCMA agencies, responsible for managing groundwater resources of the NCMA portions of the SMGB. The NCMA TG and its member agencies have established six objectives for ongoing NCMA groundwater management, including: • Share groundwater resources and manage pumping, • Monitor supply and demand, and share information, • Manage groundwater levels and prevent seawater intrusion, • Protect groundwater quality, • Manage cooperatively, • Encourage water conservation. The NCMA agencies are required by the Judgment to prepare and submit annual reports for the monitoring program, which include collection and analysis of data pertaining to the water supply and demand of the region, including land and water uses in the SMGB, supply sources, and groundwater conditions. 5.2.3.1 Zone 3 Extended Drought Emergency Supply Options Evaluation In late 2015 and early 2016, the Zone 3 member agencies and the District collaborated to identify, evaluate and develop recommendations for emergency water supply options that could be implemented in the event that current drought continued for an extended period. These agencies are continuing to monitor drought conditions and plan for the implementation of these emergency measures, should they become necessary. The emergency supply options evaluated by Zone 3 member agencies and the District are outlined in Table 5-5. City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-8 Table 5-5. Zone 3 Extended Drought Emergency Supply Options Cloud Seeding Investigate opportunities to utilize cloud seeding to enhance rainfall within the Lopez Watershed. This could involve cooperative agreement with Santa Barbara County. SWP Maximization Maximize importation of District State Water Project (SWP) supplies, including subcontractor and “Excess Entitlement” supplies. Unsubscribed Nacimiento Investigate transfer/exchange opportunities to obtain unsubscribed Nacimiento water for the Zone 3 agencies (i.e. exchange agreements with the City of San Luis Obispo and the Chorro Valley pipeline SWP subcontractors). Water Market Purchases Investigate opportunities to obtain additional imported water and deliver it to the Zone 3 agencies through the SWP infrastructure (e.g. Exchange agreements with San Joaquin/Sacramento Valley farmers, Water broker consultation, Groundwater Banking Exchange Agreements, etc.). Morro Bay Desal Investigate opportunities to obtain SWP water from Morro Bay by providing incentives for Morro Bay to fully utilize its desalination plant capacity. Land Fallowing Evaluate potential agreements with local agriculture representatives to offer financial incentives to fallow land within the Arroyo Grande and Cienega Valleys and make that water available for municipal use. Lopez Reservoir Minimum Pool Investigate feasibility of extracting water from Lopez Reservoir below the 4,000 AF minimum pool level. This may require utilization of emergency pumps to deliver the water to the Lopez Water Treatment Plant. Enchanced Conservation Evaluate opportunities for enhanced water conservation by the Zone 3 agencies beyond the Governor’s Mandatory Water Conservation Order (e.g. water rationing, no outdoor watering, agriculture water restrictions, etc.) to preserve additional water. Diablo Desal Utilize excess capacity from the Diablo Power Plant’s Desalination Facility to supply water to the Zone 3 agencies through a connection to the Lopez Pipeline. Nacimiento/CMC Intertie Complete design of pipeline that would connect the Nacimiento Pipeline to the California Men’s Colony (CMC) Water Treatment Plant. Investigate opportunities for Zone 3 agencies to purchase Nacimiento Water and utilize exchange agreements and existing infrastructure to deliver additional water to Zone 3 through the Coastal Branch pipeline. Emergency IPR Investigate opportunities to develop an Indirect Potable Reuse (IPR) Groundwater Recharge System, under emergency permits, to provide a supplemental supply for the Zone 3 Agencies. Emergency Desal Investigate opportunities to develop a desalination facility, under emergency permits, to provide a supplemental supply for the Zone 3 Agencies. Price Canyon Produced Water Investigation into opportunities to recover and utilize produced water from ongoing oil operations in Price Canyon. Upper Lopez Wells Investigate potential water storage in aquifers upstream of Lopez Reservoir and evaluate opportunities to obtain this water supply. City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-9 5.2.4 Groundwater Levels and Historical Trends The Northern Cities conduct groundwater monitoring in the NCMA, which represents the northernmost portion of the SMGB. The NCMA groundwater monitoring program utilizes collected data from three primary sources: (1) groundwater elevation data collected by San Luis Obispo County, and (2) water quality and elevation data collected by the NCMA from a network of sentry wells. Selected figures from the NCMA 2015 Annual Monitoring Report are included in Appendix F for reference, including a boundary map of the NCMA, historic annual precipitation, groundwater elevation contours, and selected hydrographs of NCMA monitoring wells. The NCMA monitoring program includes quarterly measurement of water elevations and continuous monitoring, via water level transducers, of the clustered sentry wells located along the coastal portion of the NCMA. Currently, there are 16 wells that are monitored quarterly for water level and water quality. Six of the monitored wells have transducers that collect water level, total dissolved solids (TDS) and temperature data at four-minute intervals. The data collected by the NCMA monitoring program and the County’s groundwater level monitoring program provide essential information for tracking critical groundwater elevation changes. As shown by the hydrographs in Appendix F-Figure 11, the sentry wells provide a long history of groundwater elevations. Measured water elevations in these wells reflect the net effect of changing groundwater recharge and discharge conditions in the primary production aquifer. Averaging the groundwater elevations from the three deep sentry wells provides a single, representative index, called the deep well index, for tracking the status and apparent health of the basin. Previous groundwater studies and NCMA Monitoring Annual Reports have suggested a deep well index value of 7.5 feet above mean sea level (MSL) as a threshold, below which the basin is at risk for sea water intrusion. When water levels drop below 7.5 ft, the NCMA agencies attempt to limit groundwater pumping to reduce the risk of seawater intrusion. Historical variation of this index is represented by the average deep sentry well elevations shown in Appendix F-Figure 12. Appendix F-Figure 12 shows the impact of three years of drought (2007-2009) followed by recovery of the index values in subsequent years as rainfall increased and groundwater production declined. Between April 2015 and October 2015, the deep well index remained significantly below the index trigger value. In October 2015, the deep well index began to rise and since mid-December has been above the trigger value (Appendix F-Figure 12). In 2008, the lowest measured groundwater elevation in an individual well was approximately ten feet below MSL. As described in the Northern Cities 2008 Annual Report, groundwater below MSL indicates a potential for seawater intrusion into fresh groundwater supplies. The area with lowest groundwater elevations encompasses municipal well fields, and represents a relatively broad and shallow pumping trough exacerbated by drought conditions. City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-10 Hydrographs produced through the sentry well monitoring program indicate that groundwater elevations have historically varied above and below about 20 feet above MSL. Historical hydrographs show that groundwater elevations recover to levels similar to 2006 (a wet water year) and significantly decline during dry years like 2013. These groundwater level decreases and recovery cycles illustrate the relationship between times of the drought and increased pumping, and times of recovery with increased rainfall and decreased pumping. The last three years of very low rainfall (2013-2015) has resulted in water levels throughout the area declining 10 to 20 feet. 5.2.5 Groundwater Overdraft Overdraft is the condition of a groundwater basin in which the amount of water withdrawn by pumping exceeds the amount of water that recharges the basin. By definition, overdraft is not a measure of annual fluctuations in groundwater storage volume. Rather, overdraft is a measure of the long-term trend associated with annual fluctuations. Overdraft is characterized by groundwater levels that decline over a period of years and never fully recover, even in wet years (29). DWR’s Bulletin 160-98 has identified the Central Coast Hydrologic Region to be in a state of overdraft. However, DWR also states that overdraft in this region is expected to decline as supply sources shift from groundwater to imported SWP surface water (30). As described in Section 5.2.3, a primary concern for the City and for the SMGB in general is saltwater intrusion from the coastal zone into fresh groundwater supply. Total groundwater pumping in the NCMA (urban, agriculture, and rural domestic) was 3,656.47 af in 2015, which is 38.5% of the calculated 9,500 afy safe yield of the NCMA portion of the basin. However, even with the reduced pumping, water elevations throughout the area declined by several feet, with some areas finishing the year with water elevations below sea level. Typically, when pumping is less than the safe yield, the remaining volume of groundwater results in increased groundwater in storage, which is then manifested by rising water levels. The current condition, with groundwater pumping at 38.5% of the safe yield and declining water elevations, illustrates the impacts of the ongoing severe drought that has significantly reduced recharge. 5.2.6 Existing and Projected Groundwater Pumping This section quantifies the historical and projected groundwater pumping by the City in Table 5-6 and Table 5-7. The 2008 Annual Monitoring Report for the NCMA indicated that drought conditions and subsequent increased groundwater pumping were causing groundwater elevations to drop below MSL, increasing the risk for and potentially causing seawater intrusion into groundwater aquifers. Since 2008, the City and surrounding municipalities that also rely on groundwater began an aggressive water monitoring program to identify the extent of seawater intrusion and track its progress. In addition, the City and other NCMA agencies have implemented aggressive water conservation programs and initiated efforts to maximize utilization of their surface water supplies to alleviate stress on groundwater supply. City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-11 Projected groundwater pumping includes groundwater pumped to serve City customers. The projected volumes in Table 5-7 assume that groundwater use within the NCMA will be equal to the remainder of demand not met by all other available sources of supply. The City expects to utilize groundwater to supplement Lopez Project water during peak demand periods, but intends to minimize usage when possible to protect the resource. Table 5-6. Historic Groundwater Pumping Basin Name Metered or Unmetered Historic Pumping Rates (afy) 2011 2012 2013 2014 2015 SMGB (Tri-Cities Mesa Subbasin) Metered 211 180 268 51 43 Pismo Formation Metered 138 150 120 69 44 Total Groundwater Pumped 349 330 388 121 87 Groundwater as Percent of Total Water Supply 12% 11% 12% 4% 4% Table 5-7. Projected Groundwater Pumping Basin Name Projected Pumping Rates (afy) 2020 2025 2030 2035 SMGB (Tri-Cities Mesa Subbasin) 377 459 562 606 Pismo Formation 200 200 200 200 Total Groundwater Pumped 577 659 762 806 Groundwater as Percent of Total Water Supply1 20% 22% 25% 26% 1 Groundwater use will vary depending upon availability of the other supply sources, the status of the SMGB Deep Well Index and the condition of the Pismo Formation. 5.3 TRANSFER OPPORTUNITIES The City currently does not transfer or exchange water with its neighboring water suppliers. However, the City historically purchased water from OCSD, and has studied multiple alternatives for transfers and exchanges, which are described in Section 5.6. In August 2005, the City entered into a two-year agreement with the OCSD to provide 100 afy. The City never purchased water under this agreement. In January 2009, the City renewed the contract with OCSD for a 5-year period. The City purchased 100 afy for a period of 5 years. The agreement has expired and is not expected to be renewed. City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-12 The City is currently evaluating opportunities to obtain additional water to meet demands during extended drought periods. These supplies could include State Water Project (SWP) water or desalinated water. At this point, the City does not have specific volumes identified for these potential transfer opportunities. 5.4 DESALINATED WATER OPPORTUNITIES In January 2006 and 2008, studies of desalination opportunities (5) were prepared to evaluate the feasibility of obtaining an additional 750 afy of potable water for the City from seawater desalination. The 2008 report was prepared with the assumption that two neighboring water agencies, the City of Grover Beach and the OCSD, would collaborate to determine if a seawater desalination plant would suit the supplemental water needs of each community. The City decided not to pursue desalination at that time. In 2015, San Luis Obispo County in coordination with PG&E performed an assessment of the feasibility to deliver desalinated water from the Diablo Canyon Power Plant near Avila Beach, California, to the current agencies connected to the Lopez Pipeline. Preliminary estimates indicate that between 500 afy to 1,300 afy could be delivered from the project. Next steps include refining the cost estimates, additional coordination with PG&E, obtaining the required permits, developing an Environmental Impact Report, and further optimizing the conveyance infrastructure through additional evaluation of pipeline diameter, pumping requirements, pressure class upgrade requirements and pipeline layout in order to reduce pipeline and conveyance infrastructure costs as the project progresses. In March 2016, the County authorized a budget of approximately $900,000 to allow staff to continue with the environmental permitting and stakeholder outreach components of the project. 5.5 RECYCLED WATER OPPORTUNITIES The UWMP Act requires that the UWMP address the opportunities for development of recycled water, including the description of existing recycled water applications, quantities of wastewater currently being treated to recycled water standards, limitations on the use of available recycled water, an estimate of projected recycled water use, the feasibility of projected uses, and practices to encourage the use of recycled water. 5.5.1 Wastewater Treatment Facilities The South San Luis Obispo County Sanitation District (SSLOCSD) collects, treats, and disposes of wastewater for the communities of Arroyo Grande, Oceano, and Grover Beach. The total population served by the SSLOCSD is approximately 38,424 persons, producing an average daily flow of 2.6 million gallons of wastewater per day (mgd) that is discharged through a shared outfall in addition to 1.1 mgd of flow from the City of Pismo Beach Wastewater Treatment Facility (WWTF) (9). Wastewater influent is first passed through an in-channel screen to remove large debris. After debris removal, wastewater flows through two clarifiers and then into a single fixed film reactor for secondary treatment. Wastewater effluent from the fixed film reactor then flows to secondary clarification to remove any sloughed off bacterial film. Finally, the treated wastewater is disinfected with sodium hypochlorite before being discharged to the Ocean. City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-13 5.5.2 Wastewater Flow Projections A little less than half of the total flows received at the plant, excluding flows from the Pismo Beach WWTP, were from the City. The future average annual wastewater flow was determined by multiplying the projected population by the average observed unit per capita wastewater generation rate, which is 57 gallons per capita per day (gpcd) (31). The resulting average annual historical flow and flow projections are summarized in Table 5-8. Table 5-8. Wastewater Flow Projections Type of Wastewater 2010 2015 2020 2025 2030 2035 Wastewater collected & treated in service area(1) 1,080 1,127 1,184 1,217 1,260 1,278 Volume that meets recycled water standard (2) 1,080 1,127 1,184 1,217 1,260 1,278 1 Assumes 57 gallons per capita per day based on the City’s 2011 Wastewater System Master Plan estimations and population estimates based on Census and SLOCOG data. 2 SSLOCSD currently produces secondary treated water that could be treated to “Disinfected Secondary-23 Recycled Water” standards as defined by Title 22. However, all secondary treated effluent was discharged through the ocean outfall. 5.5.3 Water Recycling Facilities SSLOCSD currently treats its effluent to a secondary level, but could treat to a Disinfected Secondary-23 treatment level, as defined by California Code of Regulations Title 22 requirements. Figure 5-2 shows the locations of the Pismo Beach WWTF and the SSLOCSD WWTF. City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-14 Figure 5-2. SSLOCSD and Pismo Beach WWTFs and Outfall City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-15 5.5.4 Regional Recycled Water Opportunities As described previously, the City of Pismo Beach currently discharges treated effluent through a pipeline that conveys the wastewater to the SSLOCSD WWTP, where effluent from both plants is discharged to the ocean through a shared outfall (Figure 5-2). The City of Pismo Beach is evaluating a Full Advanced Treatment (FAT) facility, known as the Regional Groundwater Sustainability Project (RGSP), that could be located at its existing WWTP or at an offsite location located somewhere along its effluent pipeline. Development of an offsite FAT facility would provide significant opportunity for a regional recycled water facility that could treat wastewater from both the City and the SSLOCSD WWTP. Analysis completed by the District, estimated that a regional facility could potentially provide up to 2,390 AFY of additional water supply for groundwater recharge through development of a regional FAT facility (9). SSLOCSD is also evaluating potential opportunities to develop an additional advanced treatment infrastructure that would allow it to produce water for agriculture irrigation or groundwater recharge. Development of an offsite FAT facility would provide significant opportunity for a regional recycled water facility that could treat wastewater from both the City of Pismo Beach and the SSLOCSD WWTP. On June 23, 2015, the Arroyo Grande City Council voted to direct City staff to collaborate and participate with the City of Pismo Beach on the Pismo Beach RGSP. The City is currently considering a recycled water program and plans to pursue recycled water in the future. The following recycled water studies have been completed with the goal of identifying potential recycled water projects, which would benefit the City: - Water Recycling Progress Report, Prepared for South San Luis Obispo County Sanitation District, Prepared by John L. Wallace & Associates, February 2001 - Recycled Water Distribution System Conceptual Plan- South San Luis Obispo County Sanitation District WWTP Technical Memorandum, Prepared by the Wallace Group, June 2010 (32) - Recycled Water Distribution System Conceptual Plan- City of Pismo Beach WWTP Technical Memorandum, Prepared by the Wallace Group, June 2010 (33) - Water Recycling Update report, Prepared for South San Luis Obispo Sanitation District, Prepared by the Wallace Group, January 2009 (4) - San Luis Obispo County Regional Recycled Water Strategic Plan, Prepared by Cannon, November 2014 (9) - Recycled Water Facilities Planning Study for the City of Pismo Beach , Prepared by Water Systems Consulting, Inc., April 2016 (10) City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-16 5.5.4.1 South San Luis Obispo County Sanitation District (SSLOCSD) Opportunities The SSLOCSD and the City are currently partnering on a Recycled Water Facilities Planning Study (RWFPS) to evaluate potential opportunities to upgrade SSLOCSD’s wastewater treatment process to provide water for agriculture irrigation or groundwater recharge. To assist in funding the RWFPS, the SSLOCSD and the City pursued and received a Water Recycled Facilities Planning Grant from the SWRCB. The RWFPS will evaluate construction of upgrades at its existing WWTP or an offsite advanced treatment facility, co-located with Pismo Beach. According to the Regional Recycled Water Study, a combined advanced treatment facility could possibly provide 2,400 AFY of advanced purified water to recharge the groundwater basin (9). 5.5.4.2 City of Pismo Beach Wastewater Treatment Plant Opportunities The City of Pismo Beach UWMP states that the City of Pismo Beach is “currently completing a preliminary design for a Full Advanced Treatment (FAT) facility that will allow it and potential regional partners to inject advanced purified water into the groundwater basin. This project will provide additional recharge for the basin and provide a drought-proof source of supply for the region” (34). The City of Pismo Beach plans to upgrade its WWTP to provide an anticipated recycled water supply of 645 afy (34). This supply is an estimate and has not been finalized, but provides an idea of the amount of recycled water that could be available. The City of Pismo Beach UWMP describes that the recycled water not used for groundwater recharge could be used for other purposes located along the conveyance system. If the City of Pismo Beach were to produce excess recycled water, the City could utilize the recycled water for irrigation demand, and/or work with interested NCMA agencies to apply the recycled water for groundwater recharge within the NCMA. 5.5.4.3 Summary of Potential and Projected Recycled Water Uses and Quantities Table 5-9 provides a summary of potential recycled water including estimated demand discussed in the June 2010 SSLOCSD WWTP Technical Memorandum (19) as well as an estimated groundwater recharge potential identified in the City of Pismo Beach Recycled Water Facilities Planning Study (10). Potential tertiary treated recycled water from SSLOCSD is assumed to equal the amount of tertiary recycled water demand from customer use types that can accept recycled water. It is assumed that a portion of the recoverable groundwater recharge volume identified in the City of Pismo Beach 2015 UWMP could be potentially utilized by the City and other SMGB purveyors. City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-17 Table 5-9. Potential Recycled Water Use, afy User type Description 2015 2020 2025 2030 2035 Agricultural irrigation N/A 0 0 0 0 0 Landscape irrigation Tertiary 247 247 247 247 247 Commercial irrigation N/A 0 0 0 0 0 Golf course irrigation N/A 0 0 0 0 0 Wildlife habitat N/A 0 0 0 0 0 Wetlands N/A 0 0 0 0 0 Industrial reuse N/A 0 0 0 0 0 Groundwater recharge FAT 645 645 645 645 645 Seawater barrier N/A 0 0 0 0 0 Geothermal/Energy N/A 0 0 0 0 0 Indirect potable reuse N/A 0 0 0 0 0 Total 892 892 892 892 892 1 Assumes a maximum amount of recycled water from SSLOCSD based on average annual demands from 2007-2009 for potable water from customer use types that can accept recycled water. 2 Assumes a portion of the groundwater recharge volume identified in the City of Pismo Beach 2015 UWMP could be potentially utilized by the City and other SMGB purveyors. These values are 100% of the anticipated yield from a recycled water upgrade to the Pismo Beach Wastewater Treatment Plant. The City of Pismo Beach's goal is to develop a regional recycled water project that could share the recycled water with regional partners and potentially utilize additional flows from the South San Luis Obispo County Sanitation District’s (SSLOCSD) wastewater treatment plant. If a regional project is implemented, the volume of recycled water available could increase or decrease depending upon interagency agreements and water availability from the SSLOCSD facility among other factors. Although there are opportunities for recycled water use in the future, a specific recycled water project has not been selected or analyzed in enough detail to provide a quantifiable projected supply estimate for the City at the time of the preparation of this UWMP. The 2010 UWMP didn’t project any potential recycled water use for 2015 as shown in Table 5-10 and Table 5-11 shows the City’s projected recycled water use through 2035. City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-18 Table 5-10. 2010 UWMP Recycled Water Use Projected for 2015 and Actual 2015 Recycled Water Use, afy Use Type 2010 Projection for 2015 2015 Actual Use Agricultural irrigation 0 0 Landscape irrigation 0 0 Commercial irrigation 0 0 Golf course irrigation 0 0 Wildlife habitat 0 0 Wetlands 0 0 Industrial reuse 0 0 Groundwater recharge 0 0 Seawater barrier 0 0 Geothermal/Energy 0 0 Indirect potable reuse 0 0 Total 0 0 Table 5-11. Projected Recycled Water Use, afy User type Description 2015 2020 2025 2030 2035 Agricultural irrigation N/A 0 0 0 0 0 Landscape irrigation N/A 0 0 0 0 0 Commercial irrigation N/A 0 0 0 0 0 Golf course irrigation N/A 0 0 0 0 0 Wildlife habitat N/A 0 0 0 0 0 Wetlands N/A 0 0 0 0 0 Industrial reuse N/A 0 0 0 0 0 Groundwater recharge N/A 0 0 0 0 0 Seawater barrier N/A 0 0 0 0 0 Geothermal/Energy N/A 0 0 0 0 0 Indirect potable reuse N/A 0 0 0 0 0 Total 0 0 0 0 0 City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-19 5.6 FUTURE WATER PROJECTS 5.6.1 Lopez Reservoir Spillway Raising In 2008/2009, the contract agencies of the Lopez Project conducted a study and evaluation to consider raising the spillway elevation of Lopez Reservoir, as a means of increasing safe yield in the reservoir and thus increasing water supply entitlements to the contract agencies. By raising the spillway a few feet, the overall capacity of the reservoir increases significantly. The increased capacity will correlate to a greater entitlement of the water supply that can be distributed to the City and the surrounding contract agencies. The project study examines raising the spillway of Lopez Dam by 3 to 5 feet. This would increase gross reservoir storage capacity by a maximum of 2,850-4,750 acre-feet. Annual average yield is estimated to be increased from 671 to 1,371 acre-feet. However, based on evaluation of historic drought years (1986-1996), the average yield disbursed over 11 years would provide an estimated safe yield from 259-432 afy (23). The 2009 study was updated in 2013. The updated study evaluated multiple new ranges of dam height increases and constraints scenarios. The resulting estimated additional yields are shown in Table 5-12. Table 5-12. Lopez Reservoir Spillway Raise Capacities and Yields Spillway Gate Height (ft) No Constraint Additional Yield (AFY) All Constraints Additional Yield (AFY) 0 0 0 2 854 64 4 1,486 66 6 1,966 66 8 2,386 66 10 2,677 66 12 2,904 66 1 Ranges are based on different scenarios analyzed for multiple spillway gate heights. Source: (8) The results of the study indicated that additional water yielded from this project would cost approximately $1,250 per acre-foot. Due to significant regulatory and environmental challenges (i.e. development of a Habitat Conservation Plan for Arroyo Grande Creek and obtaining an amended water rights permit for Lopez Reservoir) the Zone 3 agencies are not currently pursuing this project. City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-20 5.6.2 Supplemental State Project Water via the Coastal Branch and Lopez Pipelines The District completed a hydraulic study to determine if additional capacity exists in the Central Coast Water Authority (CCWA) State Water Pipeline for supplemental water deliveries to CCWA subscribers, including Contract Agencies (served via the Lopez Pipeline). The hydraulic study modeled the entire CCWA pipeline delivery system, plus the Lopez pipeline. The results of this study identified significant excess capacity in portions of the pipeline and the results are being used as a starting point for the District and CCWA to enter into discussions to consider utilization of the District’s excess SWP entitlement. Expanding delivery options for the District’s excess entitlement could provide an opportunity for the City to obtain a supplemental supply source. 5.6.3 Additional Stormwater Reclamation The City operates and maintains a network of stormwater infiltration, detention and retention basins throughout its service area as shown in Figure 5-3. This stormwater collection system captures or retards runoff mainly for flood control and pollution prevention purposes, but it also recharges the groundwater basin with water that would otherwise ultimately runoff to the Pacific Ocean. City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-21 Figure 5-3. Stormwater Basins and Retention Systems City of Arroyo Grande 5. System Supplies 2015 Urban Water Management Plan - Final Draft 5-22 5.6.4 PG&E Desalinated Water As discussed in Section 5.4, San Luis Obispo County, in coordination with PG&E, is performing an assessment of the feasibility to deliver desalinated water from the Diablo Canyon Power Plant near Avila Beach, California, to various agencies connected to the Lopez Pipeline. Preliminary estimates indicate that between 500 afy to 1,300 afy could be delivered from the project. Next steps include refining the cost estimates, additional coordination with PG&E, obtaining the required permits, developing an Environmental Impact Report, and further optimizing the conveyance infrastructure through additional evaluation of pipeline diameter, pumping requirements, pressure class upgrade requirements and pipeline layout in order to reduce pipeline and conveyance infrastructure costs as the project progresses. City of Arroyo Grande 6. Water Supply Reliability 2015 Urban Water Management Plan - Final Draft 6-1 6 WATER SUPPLY RELIABILITY 6.1 SUPPLY RELIABILITY BY SOURCE The relative reduction in available supplies during dry water years is variable, and depends on the projected reductions from each specific water source. 6.1.1 Lopez Reservoir The supply reliability of the City’s surface water allocation from the Lopez Project is determined by local hydrologic conditions and is governed by the contracts between the District and the Zone 3 member agencies. According to the 2015 UWMP for Zone 3, the Lopez Reservoir is a very reliable source of water with an annual safe yield of 8,730 afy. The Low Reservoir Response Plan (LRRP) was adopted in December 2014 and enacted in April 2015 when storage reached below 20,000 af. The enactment of Stage 2 of the LRRP resulted in approximately a 10% decrease in municipal diversions and downstream releases as shown in Table 6-1 and Table 6-2. The Zone 3 2015 UWMP projects that municipal entitlements will remain constant at 4,530 afy through 2035 under normal conditions, and that it will be able to supply all contracted agencies with their requested allocations in full during single dry years and multiple dry years until the fourth dry year (23). For planning purposes, it is assumed that water supply from the Lopez Reservoir during dry water years will meet the City’s full allocation of 2,290 afy except in the third year of multiple dry years. Table 6-1. Initial Prescribed Municipal Diversion Reduction Strategy Under the LRRP Amount of Water In Storage (AF) Municipal Diversion Reduction Municipal Diversion (AFY)1 20,000 0% 4,530 15,000 10% 4,077 10,000 20% 3,624 5,000 35%2 2,941 4,000 100% 0 1 The actual amount of water diverted may vary as agencies extend the delivery of their Lopez Entitlement. 2 The 35% reduction provides sufficient water to supply 55 gallons per capita per day (GPCD) for the estimated population of the Zone 3 agencies (47,696 in 2010 per the 2010 Zone 3 UWMP). 55 GPCD is the target residential indoor water usage standard used in California Department of Water Resource’s 2010 UWMP Method 4 Guidelines. City of Arroyo Grande 6. Water Supply Reliability 2015 Urban Water Management Plan - Final Draft 6-2 Table 6-2. Initial Prescribed Downstream Release Reduction Strategy Under the LRRP Amount of Water In Storage (af) Downstream Release Reduction Downstream Releases (afy)1 20,000 9.5% 3,800 15,000 9.5% 3,800 10,000 75.6% 1,026 5,000 92.9% 300 4,000 100.0% 0 1 These downstream releases represent the maximum amount of water that can be released. Actual releases may be less if releases can be reduced while still meeting the needs of the agricultural stakeholders and addressing the environmental requirements. (35) 6.1.1.1 Surplus Water from the Lopez Project Historically, the City and other contracted agencies have received surplus water from Lopez depending upon yearly requirements for downstream release. The District monitors the potential for surplus water availability consistent with the water supply agreement. For planning purposes, surplus water is not included as a reliable supply. The LRRP includes provisions for the Zone 3 agencies to extend the delivery of their Lopez water supplies while the LRRP is in effect. This in essence allows the Zone 3 agencies to carry over their unused Lopez supplies, minus evaporation, when under the LRRP. 6.1.2 Groundwater The City’s right to pump groundwater from the SMGB is defined within the Judgment After Trial (Judgment) (Appendix G), which states that the Northern Cities (Arroyo Grande included) have a paramount right to withdraw 4,000 afy (excluding agriculture conversion credits) from the Northern Cities Area of the SMGB. The City is entitled to 1,323 afy of this total, as indicated in the Management Agreement with other water purveyors in the Northern Cities Area (see Appendix G & Section 5.2). The Judgment also states that the court may exercise its equity powers in the condition that the SMGB becomes over drafted. However, there is no current language in the Judgment that stipulates the amount that supply allocations may be reduced. Therefore, for planning purposes, it will be assumed that the City may have its full allocation of groundwater available even in dry water years. With recent detections of groundwater elevations below sea level and subsequent threat of seawater intrusion, the City realizes the importance of maintaining its groundwater supplies and following a sustainable pumping plan. Therefore, the City considers and will continue to consider minimizing its impact to groundwater resources, especially during dry years or drought conditions. Table 6-3 describes historical supply conditions basis of year data and Table 6-4 shows supplies during normal and dry water years. 6.2 SUPPLY RELIABILITY - HISTORIC AND FUTURE CONDITIONS This section considers the City’s water supply reliability during three climate-related water scenarios: normal water year, single dry water year, and multiple dry water years. These scenarios are defined as follows: City of Arroyo Grande 6. Water Supply Reliability 2015 Urban Water Management Plan - Final Draft 6-3 Normal Year: The normal year is a year or an averaged range of years in the historical sequence that most closely represents average rainfall and associated reservoir recharge and groundwater recharge levels and patterns. It is defined as the year closest to the mean rainfall from 1984 through 2015. Single Dry Year: This single dry year represents the single year with the lowest rainfall and the associated historical annual yield. Multiple Dry Years: This is defined as the three (or more) consecutive years with the minimum available supply. Water systems are more vulnerable to these droughts of long duration because they deplete water storage reserves in local and state reservoirs and in groundwater basins. The supply quantities for this condition are derived from the minimum of historical three-year running average rainfall and associated reservoir recharge and groundwater recharge levels and patterns. 6.2.1 Basis of Water Year Data Historical rainfall data available from City were examined to establish a basis of water year for normal, single dry, and multiple dry years. As shown in Table 6-3, for the purposes of this report, the year 1992 is classified as a “normal” year, the year 2013 is classified as a “single dry” year, and the years 2013 to 2015 are classified as “multiple dry” years based on the data provided in the Zone 3 2015 UWMP and adjustments for the City's calendar years with the lowest historical allocations. Table 6-3. Basis of Water Year Data Supply Source 1 Average/ Normal Year Single Dry Year Multiple Dry Years Groundwater 1992 2013 2013 2014 2015 N/A Lopez Project 1991/92 2013/14 2012/13 2013/14 2014/15 2015/16 1 Based on Lopez Dam Rainfall data (36) adjusted for the City's calendar years with the lowest historical allocations. Table 6-4. Historical and Projected Water Supply Conditions Supply Source Average/ Normal Year (1992) Single Dry Year (2013) Multiple Dry Years 2013 2014 2015 Groundwater 1 1,523 1,523 1,523 1,523 1,523 Lopez Project 2 2,290 2,290 2,290 2,290 2,061 Total 3,813 3,813 3,813 3,813 3,584 Percent of Normal 100% 100% 100% 94% 1 Groundwater supplies are based on the City's allocation from the Management Agreement plus 200 afy from the Pismo Formation. In 2015, the supply available from the Pismo Formation was 160 afy, but it is assumed that the supply available from 2020-2035 will be 200 afy. 2 Lopez Project supplies are based on the data provided in the Zone 3 2015 UWMP adjusted for the City's calendar years with the lowest historical allocations. City of Arroyo Grande 6. Water Supply Reliability 2015 Urban Water Management Plan - Final Draft 6-4 6.2.2 Projected Normal Year Supply/Demand The normal year water demands through 2035 are estimated based on the per capita water use targets summarized in Section 4.1 and populations presented in Section 3.3. The projected normal water year water supply and demand projections are provided in Table 6-5. The available supplies during a normal year represent 100 percent of the available supplies discussed in Section 5. Table 6-5. Supply and Demand – Normal Year Supply/Demand Condition Projected Supply/Demand (afy) 2015 1 2020 2025 2030 2035 Supply Totals 3,544 3,813 3,813 3,813 3,813 Demand Totals 2,239 2,867 2,949 3,052 3,096 Supply and Demand Difference 1,305 946 864 761 717 Difference as Percent of Supply 37% 25% 23% 20% 19% Difference as Percent of Demand 58% 33% 29% 25% 23% 1 Based on actual Pismo Formation production and reduced available supply including a 10% reduction from LRRP for the Lopez Project supply. 6.2.3 Projected Single Dry Year Supply/Demand The projected single dry year water demands through 2035 are equivalent to normal year supply and demand projections, assuming that supply and demand do not change as a result of dry conditions. The anticipated supply decrease during a single dry year, compared to a normal year, is based on the actual water supply from 2014. As shown in Table 6-6, the City’s supplies are consistently above projected demands even during single-dry year conditions. Table 6-6. Supply and Demand Comparisons – Single Dry Year Supply/Demand Condition Projected Supply/Demand (afy) 2015 1 2020 2025 2030 2035 Supply Totals 3,544 3,813 3,813 3,813 3,813 Demand Totals 2,239 2,867 2,949 3,052 3,096 Supply and Demand Difference 1,305 946 864 761 717 Difference as Percent of Supply 37% 25% 23% 20% 19% Difference as Percent of Demand 58% 33% 29% 25% 23% 1 Based on actual Pismo Formation production and reduced available supply including a 10% reduction from LRRP for the Lopez Project supply. City of Arroyo Grande 6. Water Supply Reliability 2015 Urban Water Management Plan - Final Draft 6-5 6.2.4 Projected Multiple Dry Year Supply/Demand The projected multiple dry year water demands through 2035 are equivalent to normal year supply and demand projections with the exception of Year 3, assuming that supply and demand do not change as a result of dry conditions. The anticipated supply decrease during multiple dry years, compared to a normal year, is based on the actual water supply from 2013 through 2015. As shown in Table 6-7, the City’s supplies are consistently above projected demands even during multiple-dry year conditions. Table 6-7. Supply and Demand Comparison - Multiple Dry Year Events Supply/Demand Condition Projected Supply/Demand (afy) 2015 1 2020 2025 2030 2035 Year 1 Supply Totals 3,544 3,813 3,813 3,813 3,813 Demand Totals 2,239 2,867 2,949 3,052 3,096 Supply and Demand Difference 1,305 946 864 761 717 Year 2 Supply Totals 3,544 3,813 3,813 3,813 3,813 Demand Totals 2,239 2,867 2,949 3,052 3,096 Supply and Demand Difference 1,305 946 864 761 717 Year 3 Supply Totals(1) 3,544 3,584 3,584 3,584 3,584 Demand Totals 2,239 2,867 2,949 3,052 3,096 Supply and Demand Difference 1,305 717 635 532 488 1 Based on actual Pismo Formation production and reduced available supply including a 10% reduction from LRRP for the Lopez Project supply. 6.2.5 Projected Minimum Three Year Supply The projected three-year minimum supply for 2016-2018 is based on the historically lowest allocations for the Lopez Project and the lowest production year for SMGB from 2001-2015, as shown in Table 6-8. Table 6-8. Three-Year Minimum Supply Supply Source Multiple Dry Years1 2016 2017 2018 Groundwater 43 43 43 Lopez Reservoir 2,061 2,061 2,0612 Total 2,104 2,104 2,104 1 Based on lowest historical production from 2001-2015, which occurred in 2015, and the lowest Lopez Project allocation with a 10% allocation reduction in 2015. 2At the time of preparation of this UWMP, the City was taking a voluntary 20% reduction in their Lopez Reservoir supply, but it that reduction is not used for planning purposes in this UWMP. City of Arroyo Grande 6. Water Supply Reliability 2015 Urban Water Management Plan - Final Draft 6-6 6.2.6 Resource Maximization and Import Minimization The City is currently not utilizing any imported supplies. The City is also working with regional partners to evaluate potential supplemental supplies to bolster reliability of local supplies. These projects include recycled water, desalination, enhanced surface water capture and are described in Sections 5.5 and 5.6. Additionally, the City is evaluating the possibility to obtain SWP water to assist in bolstering its water supply portfolio in drought periods. The City is in the process of placing a measure on the Fall 2016 ballot that will let the City’s customers vote to authorize the emergency purchase of State water. A previous ballot measure passed in 1990 requires a public vote before the City can consider the purchase State water. The City will also continue to emphasize water conservation to help reduce reliability on its existing water supplies. Additional information regarding the City’s water conservation efforts is available in Section 8. 6.2.7 Factors Affecting Supply Reliability There are a variety of factors that can impact water supply reliability. The City has relied on surface water and groundwater sources for the past 45-year period. Some factors that affect supply reliability are legal and climatic as shown in Table 6-9. The legal factors include the adjudication of the Santa Maria Groundwater Basin and the contractual obligations of the Lopez Reservoir Project. Some environmental factors include the Endangered Species Act incidental take authorization requirements for steelhead and red-legged frogs downstream from the Lopez Reservoir. For more information, see Section 6.2.7.2. Some climatic factors include extended drought conditions that could affect availability of Lopez Reservoir water, and Santa Maria Groundwater Basin water. The conjunctive use of the groundwater basins and surface water supplies provides an effective management strategy, which increases the overall reliability of all the resources to meet current and future water demands. Based on the information available at this time, it is calculated that the City currently has a safe yield estimate of 3,584 afy. A breakdown of this value, along with a 20-year projected safe yield estimate can be found in Table 6-4. Factors impacting the City’s supply sources are indicated as appropriate in Table 6-9. A brief discussion on each of these factors is provided below. Table 6-9 Factors Affecting Water Supply Reliability Water Supply Sources Legal Environmental Water Quality Climatic Lopez Project X X X Groundwater X X X City of Arroyo Grande 6. Water Supply Reliability 2015 Urban Water Management Plan - Final Draft 6-7 A fundamental factor that affects water supply reliability is the hydraulic capacity of the City’s production and distribution system facilities (e.g., groundwater wells, treatment facilities, transmission mains). However, as the City continues to grow it will construct the additional supply and distribution system facilities necessary to accommodate the increased water demands associated with this growth. For this reason, the physical capacity of the City’s supply facilities is assumed to not be a limiting factor affecting the reliability of the City’s supply in the future, and is not listed in Table 6-9. 6.2.7.1 Legal Factors The legal factors affecting supply reliability apply to the City’s entitlement to groundwater from the Tri- Cities Mesa Subbasin (Subbasin), within the SMGB. Since the SMGB is adjudicated, the City is entitled only to 1,323 afy of groundwater from the Subbasin, as dictated by the Management Agreement (Appendix G) and Judgment (Appendix G). The Judgment suggests that the allocated groundwater rights may be decreased in the future if drought and/or overdraft conditions persist. Therefore, if groundwater supplies are limited or reduced in this area, the City’s entitlement may be reduced. Additionally, the District is in discussions with the SWRCB regarding obtaining an amended water rights permit for its operation of Lopez Reservoir. The current permit only allows for “diversion to storage” and not “direct diversion”. Currently, the Lopez Reservoir utilizes “direct diversion” as part of its normal operations. The District is requesting a time extension on its original permit to allow it to submit its application for an amended permit that would allow for “direct diversion”. However, an amended permit cannot be obtained without a Habitat Conservation Plan (HCP), which is described in the Environmental Factors section below. 6.2.7.2 Environmental Factors Environmental factors affecting water supply reliability typically include concerns over protection of ecosystems, particularly for fish and wildlife resources. To date, the City’s groundwater supply has not been impacted by any environmental factors, and the City does not anticipate future disruption of groundwater supply as a result of environmental factors. Surface water from the Lopez Reservoir is a generally reliable water supply source for the City. However, deliveries have the potential to be affected by the presence of steelhead trout and the California red- legged frog that utilize the Arroyo Grande Creek watershed downstream of Lopez Dam, which are considered threatened or endangered species under the Federal Endangered Species Act. The Endangered Species Act permits non-federal entities to obtain incidental take authorization for protected species by developing an HCP. As such, the District is developing an HCP that describes commitments and assurances associated with the implementation of measures to avoid, minimize, and mitigate impacts of management activities on threatened species. It is anticipated that a new downstream release program will be proposed to the environmental regulatory agencies in the near future. The development of an HCP and the associated approval of the updated downstream release program is required to allow the District to obtain an amended water rights permit from the SWRCB. City of Arroyo Grande 6. Water Supply Reliability 2015 Urban Water Management Plan - Final Draft 6-8 6.2.7.3 Water Quality Factors The primary water quality factor affecting supply reliability for the City is the threat of seawater intrusion into fresh groundwater aquifers. Under natural and historical conditions, a net outflow of freshwater from the groundwater basin towards the ocean has kept the seawater/freshwater interface from moving onshore. However, the NCMA monitoring event of 2009 indicated coastal groundwater elevations that were below mean sea level (MSL) and detect water quality constituents consistent with seawater intrusion. Affected cities (including Arroyo Grande) implemented water conservation methods and reduced groundwater pumping, ultimately resulting in significant recovery of groundwater elevations to above MSL in 2010 and 2011. However, in the current extended drought, the groundwater levels in the NCMA sentry wells have dropped to levels similar to those seen in 2009 and thus created the potential for seawater to again intrude onshore. If these conditions continue, seawater intrusion will continue to pose a threat to the water quality of the City’s groundwater supply. 6.2.7.4 Climatic Factors Climatic factors affecting the reliability of a given water supply system generally are a function of seasonal precipitation and runoff characteristics. As such, limited recharge and/or drought conditions pose threats to availability of both surface water and groundwater supplies. When yearly precipitation is low, groundwater recharge may not be sufficient to meet safe yield estimates. Therefore, the City’s groundwater supplies will likely be negatively affected in future drought conditions with below-average rainfall and recharge. The Judgment (Appendix G) and Management Agreement (Appendix G) regarding the City’s groundwater entitlement do not specify reductions in allocations during drought conditions or decreased groundwater supply. The lack of guidance on supply reductions indicates that the City may maintain its full groundwater allocation even during drought conditions. City of Arroyo Grande 7. Water Shortage Contingency Planning 2015 Urban Water Management Plan - Final Draft 7-1 7 WATER SHORTAGE CONTINGENCY PLANNING Water shortage contingency planning is a strategic planning process to prepare for and respond to water shortages. Good planning and preparation provides the City with the tools to maintain reliable supplies and reduce the impacts of supply interruptions due to extended drought or catastrophic supply interruptions. The primary goals of the City’s Water Shortage Contingency Plan (WSCP) are to restrict water use and eliminate water waste during a declared water shortage emergency. The specific objective of the WSCP is to educate and inform the community on short- and long-term water supply conditions and the importance of efficient water use in order to protect public health and safety. 7.1 STAGES OF ACTION AND REDUCTION OBJECTIVES The City’s water conservation ordinance describes two stages of mandatory concservation that may be invoked during water supply shortages. Each stage would include a water reduction objective by customer class which may vary based on the nature of water supply emergency. The plan is dependent on the cause, severity, and anticipated duration of the water supply shortage. A combination of mandatory water conservation measures would be used to reduce water usage in the event of water shortages. Table 7-1 shows the two stages and their representative conditions and reduction objectives. Declarations of water supply conditions would occur periodically after evaluation by the City Council at which time they would set the level (percent reduction) of mandatory conservation required based on the condition of the City’s water supply. The level of mandatory reductions may include up to a 50% reduction. The respective water supply condition dictates the mandatory water conservation measures in effect at any particular time in the City. Table 7-1. Water Shortage Contingency - Rationing Stages Stage Condition Reduction Objective I – Mandatory • City Council determines it is imminent that the city's water supply has or will become so limited that an emergency water shortage condition exists as far as the available water supply being less than projected demand Determined by the City Council based water supply conditions II – Mandatory • The City Council determines that the projected city's water supply is or will become equal to or less than amounts that have been determined necessary to meet basic minimum household health and safety requirements Determined by the City Council based water supply conditions with reductions up to 50% City of Arroyo Grande 7. Water Shortage Contingency Planning 2015 Urban Water Management Plan - Final Draft 7-2 The City is responsible for supplying water for the health and safety needs of the community. If it appears that the City may be unable to supply the normal demands and requirements of the water customers, the City Council may, by resolution, declare a water supply shortage condition. Based on the severity of the predicted shortage, the City will take the following actions: Stage I: A. After holding a noticed public hearing in accordance with the requirements of Water Code Section 350 et seq., the city council may declare a stage 1 water shortage emergency based upon a determination that there has been impacts to the city's water supply, and/or it has been determined that it is imminent that the city's water supply has or will become so limited that an emergency water shortage condition exists as far as the available water supply being less than projected demand necessitating the institution of reductions in water usage based upon historical use, as further set forth in section B. B. Upon adoption of a stage 1 water shortage emergency resolution, all residential customers will be assigned a baseline amount of water, based upon the amount of water used during the same billing period of the previous year prior to the adoption of the resolution. All residential customers shall reduce water usage by a percentage amount set forth in the resolution, which percentages may be modified or amended by the city council as deemed necessary and appropriate. The percentage of required conservation shall increase depending on the billing tier of the residential customers’ water use as provided in the city's tiered water rate structure. The resolution shall include provisions for the imposition of mandatory financial penalties if the amount of water in each tier is exceeded, which penalties may also be modified or amended by the city council as deemed necessary and appropriate based upon a determination of the severity of the water shortage emergency. The following shall be used as a general framework for the resolution establishing the baseline units for billing tiers and penalties, subject to such revisions deemed necessary in order to achieve the desired water savings: Residential customers in tier 0 are not required to reduce consumption. Residential customers in tier 1 shall be required to reduce consumption by the lowest percentage. Residential customers in tier 2 shall be required to reduce consumption by a larger percentage than those in tier 1. Residential customers in tier 3 shall be required to reduce consumption by an even larger percentage than those in tier 1 and tier 2. For example, tier 1 customers may initially be required to conserve five percent, tier 2 customers ten (10) percent and tier 3 fifteen (15) percent. As the emergency worsens, the city council, may by resolution, increase the percentage reduction deemed necessary in order to achieve the projected amount of water savings established as necessary. Stage II: A. After holding a noticed public hearing in accordance with the requirements of Water Code Section 350 et seq., the city council may declare a stage 2 water shortage emergency based upon a determination that the projected city's water supply is or will become equal to or less than amounts that have been determined necessary to meet basic minimum household health and safety requirements, and restrictions and limits through the implementation of water allocations are necessary for continued water use that is reliable and sustainable by providing a minimum supply for the most essential purposes for human consumption, sanitation, and fire protection during the emergency situation. City of Arroyo Grande 7. Water Shortage Contingency Planning 2015 Urban Water Management Plan - Final Draft 7-3 B. Upon adoption of a stage 2 water shortage emergency, restrictions and limits shall be imposed through the implementation of household allocations of water units for residential customers. All residential customers will be allocated units of water deemed necessary for an average household size (one unit of water is equal to one hundred (100) cubic feet or seven hundred forty-eight (748) gallons). Any residential customer using over the assigned baseline unit amount shall be subject to a citation and the imposition of mandatory financial penalties, which shall be set forth in the resolution adopted by the city council and be based upon the severity of the water shortage emergency. Each household shall be allowed twelve (12) units of water per two-month billing period (which is equivalent to one hundred fifty (150) gallons per household per day). Households with over five to seven people will be allowed twenty (20) units of water per two-month billing period (two hundred fifty (250) gallons per day). Households with over seven people will be allowed twenty-eight (28) units of water per two-month billing period (three hundred fifty (350) gallons per day). The allocations contained herein may be adjusted by the city council by resolution. Commercial properties and irrigation meters. During a stage 1 water shortage emergency commercial water customers shall not be subject to mandatory penalties for use, provided however, that commercial customers with irrigation meter accounts shall reduce water use by such percentages specified in the resolution declaring the water shortage emergency. During a stage 2 water shortage emergency commercial water customers shall not use potable water for irrigation of outdoor landscaping. All commercial irrigation meters shall be shut off and billing will be suspended. The resolution shall also establish mandatory financial penalties for failing to meet required water use reductions. Additional requirements and restrictions during stage 1 or stage 2 water shortage emergency. Upon adoption of a resolution declaring a stage 1 or stage 2 water shortage emergency the following shall apply: 1. Commercial, industrial or irrigation meter customers shall immediately follow any directive issued or declared by the city's water department to conduct water use audits, prepare water conservation plans and immediately repair any identified water system leaks, including leaks attributable to faulty pipes or fixtures. Commercial customers shall not violate any other water use restrictions intended to preclude excessive water usage, as adopted by the city. 2. Residential customers shall not violate any water use/allocation or other water rationing regulation implemented by resolution of the city council, including such regulations intended to preclude excessive water usage and specifying maximum water usage limitations, as otherwise provided by this chapter. 7.2 ACTIONS DURING A CATASTROPHIC INTERRUPTION In the event of a sudden and catastrophic loss of water supply, the City has written an Emergency Response Plan (ERP) to guide the City’s employees during disasters such as earthquakes, floods, wild land fires, dam failures, and terrorism. In addition to the emergency response guidelines established for City personnel, the Plan includes a Memorandum of Understanding between cities within San Luis Obispo County to offer assistance as available to neighboring cities during time of disaster. City of Arroyo Grande 7. Water Shortage Contingency Planning 2015 Urban Water Management Plan - Final Draft 7-4 The ERP contains detailed action items to the following list of events that might result in a drastic loss in supply. 1. Structural Damage from an Explosive Device 2. Power Outage 3. Natural Event (Flood) 4. Natural Event (Winter Storm) 5. Natural Event (Hurricane/Tropical Storm) 6. Natural Event (Earthquake) In the event of a power outage, the City’s response strategy is to first determine if the reason for the outage is local to the plant or regional, then estimate the time to return power. This will provide the City with the significance of the situation and will help assess the need to secure additional fuel for generators. The treatment process would be operated to minimize the effects of the power loss. The problem should be remedied as quickly as possible, however, if the supply cannot be returned and an eventual loss of supply occurs, customers shall be notified of how to proceed. The first response in the event of an earthquake is to perform a system audit to determine the extent of damage to utilities, piping, and processes. This audit will allow the City to concentrate staff and resources on issues that need to be addressed immediately. Additional staff will be required for sampling, analysis, equipment repair, manual equipment and process operation, and communication. A report of the damage will be issued to the Incident Commander followed by a list of supplies that are necessary for repairs. In the event of an emergency that interrupts use of a surface water source, the City will be able to provide an average flow of 300 gallons per capita per day from the City well water. City of Arroyo Grande 7. Water Shortage Contingency Planning 2015 Urban Water Management Plan - Final Draft 7-5 7.3 MANDATORY PROHIBITIONS ON WATER WASTING The following water waste prohibitions are in effect at all times and will remain in effect during any declared water shortage emergency. Table 7-2. Water Shortage Contingency - Mandatory Prohibitions Prohibitions Mandatory Prohibition Stage All use of water which results in excessive gutter runoff. Stage I, II Use of water for cleaning driveways, patios, parking lots, sidewalks, streets, or other such uses except as necessary to protect public health or safety. Stage I, II Outdoor water use for washing vehicles shall be attended and have hand-controlled watering devices. Stage I, II Outdoor irrigation between the hours of 10 AM and 4 PM. Stage I, II Limited days for outdoor irrigation Stage I, II Use of potable water for compaction or dust control purposes in construction activities. Stage I, II Outdoor water use for washing vehicles shall be attended and have hand-controlled watering devices. Stage I, II Hotel, motel or other commercial lodging establishment shall offer their patrons the option to forego the daily laundering of towels, sheets and linens. Stage I, II Emptying and refilling of swimming pools and commercial spas is prohibited except to prevent structural damage and/or to protect public health or safety. Stage I, II Restaurants or other commercial food service establishments shall not serve water except upon the request of a patron. Stage I, II 7.4 CONSUMPTION REDUCTION METHODS IN MOST RESTRICTIVE STAGE In order to achieve up to a 50 percent reduction in water use during a water supply emergency, the City will consider the implementation of other measures in addition to the measures identified in this UWMP as appropriate. 7.5 EXCESSIVE USE PENALTIES Any violation of the conservation regulations and restrictions on water use may result in termination of water service until the violation is corrected, and until all appropriate fees and penalties are paid in full. Table 7-3 lists the specifics of the penalties and in what stages they may occur in addition to the water conservation requirements contained in City Municipal Code Section 13.05 as described below. City of Arroyo Grande 7. Water Shortage Contingency Planning 2015 Urban Water Management Plan - Final Draft 7-6 Violation of any provision of City Municipal Code Section 13.05 may result in termination of water service until such violation is corrected, and until penalties are paid in full and will be subject to the following administrative procedure: 1. Written notice to the alleged offender, including the furnishing of informational material and advice where appropriate; 2. Recovery of all city staff costs, including overhead, or any second or greater offense within any one-year period; 3. Additional civil administrative penalties for any third or greater offense within any one-year period; 4. The right to appeal first to the utility billing adjustment committee and then to the city council. In addition to, and completely separate from, the civil enforcement provisions of the ordinance codified in this chapter, any person who knowingly and willfully violates the provisions of this chapter shall be guilty of a criminal misdemeanor as provided in the general penalty provisions of this code. All previous attempts by the city to obtain compliance by the defendant may be introduced as evidence of the offender's knowledge and willfulness. Table 7-3. Water Shortage Contingency - Penalties and Charges Penalty/Charge Stage When Penalty Takes Effect Termination of water service until violations of the water conservation ordinance is corrected. I, II Criminal misdemeanor for any person who knowingly and willfully violates the provisions in the City’s Municipal code. I, II 7.6 REVENUE AND EXPENDITURE IMPACTS/MEASURES TO OVERCOME IMPACTS The majority of operating costs for most water agencies are fixed rather than a function of the amount of water sold. As a result, when significant conservation programs are undertaken, it is frequently necessary to raise water rates because the revenue generated is based on lower total consumption while the revenue required is basically fixed. The City’s Water Shortage Contingency Plan describes that to counteract the financial impact of conservation, the City may institute an increase in the rate structure so that lower projected water consumption would generate a new rate based on the revenue needed by the City’s Water Enterprise fund. 7.7 WATER CONSERVATION ORDINANCE The City adopted its Water Conservation Ordinance in 2015. A copy of the City’s Municipal Code containing the ordinance is included in Appendix H. City of Arroyo Grande 7. Water Shortage Contingency Planning 2015 Urban Water Management Plan - Final Draft 7-7 7.8 REDUCTION MEASURING MECHANISM The City’s primary mechanism of measuring water use and, subsequently, water use reduction, is through the use of water meters. Therefore, to measure actual reductions in water use in the course of carrying out a water supply shortage contingency plan, the City may perform water meter readings for individual connections. Potable water production figures are recorded daily at the City Corporation Yard. The daily data is compiled into monthly reports and annual reports sent to the SWRCB and San Luis Obispo County. The City also maintains copies of all reports prepared. These reports can be used to compare monthly and annual water consumption to determine the efficiency of implemented water conservation measures. If the City determines that the desired level of water conservation is not being reached, additional conservation measures can be implemented with the direction of City Council. City of Arroyo Grande 8. Demand Management Measures 2015 Urban Water Management Plan - Final Draft 8-1 8 DEMAND MANAGEMENT MEASURES The Demand Management Measures (DMM) section provides a comprehensive description of the water conservation programs that the City has implemented for the past five years, is currently implementing, and plans to implement in order to meet the 2020 urban water use reduction targets. The section of the California Water Code (CWC) addressing DMMs was significantly modified in 2014 based on recommendations from the Independent Technical Panel (ITP) to the legislature. The ITP was formed by DWR to provide information and recommendations to DWR and the Legislature on new DMMs, technologies and approaches to water use efficiency. The ITP recommended, and the legislature enacted, streamlining the requirements from the 14 specific measures reported on in the 2010 UWMP to six more general requirements plus an “other” category for measures agencies implemented in addition to the required elements. The required measures are summarized in Table 8-1. Table 8-1. Demand Management Measures Measure 1 Water waste prevention ordinances 2 Metering 3 Conservation pricing 4 Public education and outreach 5 Programs to assess and manage distribution system real loss 6 Water conservation program coordination and staffing 7 Other demand management measures 8.1 DEMAND MANAGEMENT MEASURES (DMMS) IMPLEMENTED OR PLANNED TO BE IMPLEMENTED Consistent with the requirements of the CWC, this section describes the demand measurement measures from Table 8-1 that have been implemented in the past five years and will continued to be implemented into the future in order to meet the City’s 2020 water use targets pursuant to Section 10608.20 of the CWC. 8.1.1 DMM – Water Waste Prevention According to the DWR 2015 UWMP Guidebook, a water waste ordinance explicitly states the waste of water is to be prohibited. The ordinance may prohibit specific actions that waste water, such as excessive runoff from landscape irrigation, or use of a hose outdoors with a without a shut off nozzle. City of Arroyo Grande 8. Demand Management Measures 2015 Urban Water Management Plan - Final Draft 8-2 In Chapter 13.05 of the City’s Municipal Code, water waste prohibitions listed below are in effect at all times: • All use of water which results in excessive gutter runoff. • Use of water for cleaning driveways, patios, parking lots, sidewalks, streets, or other such uses except as necessary to protect public health or safety. • Outdoor water use for washing vehicles shall be attended and have hand-controlled watering devices. • Outdoor irrigation between the hours of 10 AM and 4 PM. • Limited days for outdoor irrigation • Use of potable water for compaction or dust control purposes in construction activities. • Outdoor water use for washing vehicles shall be attended and have hand-controlled watering devices. • Hotel, motel or other commercial lodging establishment shall offer their patrons the option to forego the daily laundering of towels, sheets and linens. • Emptying and refilling of swimming pools and commercial spas is prohibited except to prevent structural damage and/or to protect public health or safety. • Restaurants or other commercial food service establishments shall not serve water except upon the request of a patron. 8.1.2 DMM – Metering According to the DWR 2015 UWMP Guidebook, an agency that is fully metered will state that fact in the UWMP. If an agency is not yet full metered, it will discuss its plans for becoming fully metered in accordance with CWC 527. All of the City’s service connections are metered and billed based on volume of use. Meter replacements are performed on an as-needed basis. The City will continue to require that water meters be installed on new service connections and will perform replacements to help optimize its metering program. 8.1.3 DMM – Conservation Pricing According to the DWR 2015 UWMP Guidebook, retail water agencies need to describe the pricing structure that is used by the water agency. Conservation pricing sends a signal to customers regarding their water use. Conservation pricing is designed to discourage wasteful water habits and encourage conservation. The City applies variable water service rate structures by customer class. Rates based on volume of use encourage water conservation by customers. Table 8-2 shows the water bi-monthly base rate and tiered consumption rates for a single family customer with a unit defined as 100 cubic feet (748 gallons). City of Arroyo Grande 8. Demand Management Measures 2015 Urban Water Management Plan - Final Draft 8-3 Table 8-2. Single Family Rate Structure Units Rate Base Fee ⅝ - $27.52 ¾ - $29.53 1-18 HCF $3.42 19-36 HCF $3.76 37+ HCF $5.02 Multi-family customers pay a base rate dependent on meter size (Table 8-5) and tiered consumption rates. Table 8-3 shows the tiered rate structure. Table 8-3. Multi-family Rate Structure Units Rate 1-18 HCF $3.42 19-27 HCF $3.76 28+ HCF $5.02 Non-residential customers pay a base rate dependent on meter size (Table 8-5) and a uniform rate based on their customer classification and metered consumption. Table 8-4shows the uniform rate structure based on the customer classification. Table 8-4. Non-residential Water Rates Customer Class Rate (uniform) Business $3.57 Irrigation $3.81 Hydrant $5.72 Wheeling $1.91 Table 8-5. Base Fees for Meter Size Meter Size Base Fee ⅝” $27.52 ¾” $29.53 1” $35.55 1.5” $43.58 2” $65.55 3” $228.21 4” $288.42 6” $428.91 8” $589.46 City of Arroyo Grande 8. Demand Management Measures 2015 Urban Water Management Plan - Final Draft 8-4 8.1.4 DMM – Public Information Programs In 2014, the City initiated a water conservation public education program in partnership with the City of Pismo Beach. This effort included: • Conducted a survey of residents to help determine a marketing strategy • Creation and maintenance of a branded website (www.thinkh20now.com) • Creation and maintenance of Facebook and Twitter pages for the campaign • Water conservation pledge • Broadcast advertising (e.g. Pandora, Regal Cinemas, Cable Channel 20) • Business outreach • Community outreach • Press releases • Event flyers Although the campaign was scaled back in September 2015, the public education program has been well received and proved successful, as demonstrated in the reduction in per capita water use over the past two years. Arroyo Grande and Pismo Beach staff currently maintain the social media accounts. The City also sponsors free water conservation education programs for public and private schools (grades K-6). The City has contracted with Science Discovery since 2012 for this purpose. It is expected that the City will continue to sponsor this school program. In addition, the City presented a South County Water Symposium in August 2015, which included presentations from local experts on water-related topics and a variety of information booths. The Symposium was well attended with an estimated 150 participants. Finally, the City participates in a San Luis Obispo County regional collaborative to maintain a water wise gardening website (“GardenSoft”). This is a valuable resource to inspire and guide residents to save water outside the home. The customized website includes local garden tours, garden galleries, various plant lists, garden resources, water conservation tips, and watering guides. The website has been in place since 2011. 8.1.5 DMM – Water Loss Control The City accounts for water production and consumption and reports results to DWR each year. The City maintains an on-going program of meter testing and replacement that tracks the age and testing frequency of each city meter. Water for flushing operations and other maintenance procedures is also estimated and recorded. Between the years 2011 and 2015, NRW has averaged 5.5%. Additionally, the City repairs all water main and service leaks upon notification or detection. The City also uses ultrasonic leak detectors to survey water mains and services. In conjunction with this DMM, the City has an ongoing funded Capital Improvement Program that replaces older water mains and services. The City completed the AWWA System Water Loss spreadsheet for the calendar year 2015 and will continue to update the spreadsheet on an annual basis (see Appendix E). City of Arroyo Grande 8. Demand Management Measures 2015 Urban Water Management Plan - Final Draft 8-5 8.1.6 DMM – Conservation Coordinator and Staffing Support The Water Conservation Coordinator role was added to an existing planning position in 2008. The amount of time dedicated to this role has varied over the years depending on workload and priorities. On average, approximately 25% of this full time position is allocated to managing various water conservation programs. Given the overlapping City department concerns and responsibilities related to the recent drought, the City created a staff interdepartmental Drought Team to coordinate water use reduction strategies. Efforts include adopting a Water Emergency Ordinance and declaring a Stage 1 Water Shortage Emergency with mandatory water reductions. The Drought Team also provides monthly status reports to the City Council on water supply and demand. 8.2 OTHER DEMAND MANAGEMENT MEASURES The City is committed to implementing cost effective programs that will increase water efficiency City- wide. Though not required, the City has implemented the following demand management measures during the past five years in order to increase the overall water efficiency of the City’s customers. 8.2.1 Water Conservation Incentive Programs Given anticipated recurring drought cycles, the City’s goal has consistently been to maintain a sustaining conservation ethic resulting in the same low level of water consumption during and after drought conditions. To do this, the City implemented several water conservation programs that provide relatively permanent water use reductions. The tables below summarize the success of these programs. Table 8-6. Cash for Grass Program Summary Year # Applications Submitted # Grass Conversions Completed Square Footage of Grass Removed *Estimated Gallons of Water Saved per Year 2009 94 65 81,238 1,462,284 2010 24 22 21,131 380,358 2011 23 21 30,333 545,994 2012 17 13 14,348 258,264 2013 14 10 15,472 278,496 2014 137 92 119,099 2,143,782 2015 306 219 302,083 5,437,494 2016 Applications not accepted in 2016 Total: 615 442 583,704 (13.4 acres) 10,506,672 (32.2 AFY) *Based on an average savings of 18 gallons per square foot of grass removed per year. City of Arroyo Grande 8. Demand Management Measures 2015 Urban Water Management Plan - Final Draft 8-6 Table 8-7. Water Efficient Washer Rebate Program Summary Year # Rebates Issued *Estimated Gallons of Water Saved per Year 2009 36 108,000 2010 20 60,000 2011 22 66,000 2012 15 45,000 2013 2 6,000 2014 17 51,000 2015 70 210,000 2016 Applications not accepted in 2016 Total: 182 546,000 (1.68 AFY) *Based on an average savings of 10 gallons/load from older washers, and an estimated 300 loads per household per year (average of 3,000 gallons per year per machine). Table 8-8. Smart Irrigation Controller and Sensor Program Summary Year # Smart Irrigation Controllers Installed Estimated Water Savings 2009 32 The standard water savings is 15%. The number of gallons saved depends on individual irrigation design and area. 2010 13 2011 5 2012 7 2013 2 2014 20 2015 33 Total: 112 Table 8-9. 2004-2016 Plumbing Retrofit Summary Structure Type Number of Retrofits Single Family Homes 2,035 Apartment Units 547 Mobile Homes 237 Motel Rooms 243 Churches 9 Public Facilities 7 Commercial Establishments 153 Total 3,231 City of Arroyo Grande 8. Demand Management Measures 2015 Urban Water Management Plan - Final Draft 8-7 Table 8-10. 2004-2016 Plumbing Replacements Summary by Plumbing Hardware Type Plumbing Hardware Type Number of Replacements Toilets 5,069 Faucet Aerators 4,134 Showerheads 1,858 Pressure Regulators 417 Estimated Water Consumption Reduction 177 afy As can be seen in the above tables, participation in the City’s water conservation rebate programs have been well received since 2009 when they were first implemented. Advertisement for these programs was strong during this time, but then tapered off for the next several years. Participation increased dramatically when the City increased the rebate amounts for the Cash for Grass and Washing Machine Rebate Programs in 2014 (from $0.50 to $1.00 per square foot for turf removal, and from $150 to $200 per washing machine replacement). Success can also be attributed to the increased awareness about the drought, an initial robust marketing effort, water use restrictions, and penalties for non-compliance. The City has additionally contributed to large area irrigation retrofits for commercial, institutional and homeowner association (HOA) water users since 2009. With the assistance of Sprinkler King, Inc., the City has retrofitted the following properties: • Oak Park Blvd Landscaping • Vista Del Mar HOA • Woodland Pocket Park • Wildwood Ranch HOA • Strother Park • Five Cities Center • St. Patrick’s School • Kmart Center • Sunrise Terrace Mobilehome Park • Cemetery District • Paulding School • Rancho Grande Park • Ocean View School It is estimated that 17.39 AFY is saved from the Strother Park, Paulding School, Ocean View School, Cemetery District and Rancho Grande Park irrigation retrofits (audits for determining post-project water savings have not been completed for the other properties). The City-owned Property Landscape Irrigation Retrofit Program has provided a comprehensive effort to reduce water use at City parks and other landscaped areas. This program commenced in 2014 and involves removing turf combined with retrofitting irrigation systems and installing drought tolerant plants. It is estimated that this program generates a water savings of approximately 14 AFY. City of Arroyo Grande 8. Demand Management Measures 2015 Urban Water Management Plan - Final Draft 8-8 The City’s plumbing retrofit program, established in 2004, replaces old, high water-use fixtures for residential units built prior to 1992. All parts and labor required for the retrofit are provided free of charge. The retrofit includes replacing the following fixtures: • Toilets – replace with ultra low-flow 1.6 gallons per flush (as of January 1, 2014 the requirement is 1.28 gallons per flush). • Indoor Faucets – install aerators designed for 2.0 gallons per minute. • Showerheads – replace with 2.5 gallons per minute. • Pressure Regulator – inspect and adjust or install new regulator not to exceed 80 pounds per square inch (psi). This program is voluntary; however, in February 2005 the City Council adopted an ordinance implementing a mandatory plumbing retrofit program upon the change of ownership of any real property. The seller must retrofit the property’s plumbing fixtures to meet the criteria of low-water use. As of April 1, 2016, the Plumbing Retrofit Program has completed 2,035 single-family homes, 547 apartment units, 237 mobile homes, 243 motel rooms, 9 churches, 7 public facilities, and 153 commercial establishments. A total of 5,069 toilets, 4,134 faucet aerators, 1,858 showerheads and 417 pressure regulators have been installed or replaced. The estimated water consumption reduction is 177 afy. The City has eliminated many of the water conservation rebate programs for numerous reasons, including reduced City funding, existing State turf removal and toilet replacement rebates, and new regulations in the Plumbing Code and landscape irrigation requirements to provide permanent reductions in water usage. The Plumbing Retrofit, City Landscape Irrigation, Public Education, School Education, Water Conservation Workshops and GardenSoft Website licensing remain active programs. City of Arroyo Grande 9. References 2015 Urban Water Management Plan - Final Draft 9-1 9 REFERENCES 1. California Department of Water Resources. Guidebook to Assist Water Suppliers in the Preparation of a 2010 Urban Water Management Plan . March 2011. 2. —. Methodologies for Calculating Baseline and Compliance Urban Per Capita Water Use. February 2011. 3. City of Arroyo Grande Public Works Department. City of Arroyo Grande Water Supply Alternatives Study. August 24, 2004. 4. Wallace Group. Water Recycling Update Report Prepared for the South San Luis Obispo County Sanitation District. January 2009. 5. —. South San Luis Obispo County Desalination Funding Study . October 2008 . 6. —. Supplemental Water Supply Study Nacimiento Pipeline Extension City of Arroyo Grande, City of Grover Beach, Oceano Community Services District. January 2006. 7. Water Systems Consulting, Inc. CAPACITY EVALUATION OF THE LOPEZ PIPELINE FOR DELIVERY OF ADDITIONAL STATE WATER PROJECT SUPPLIES TO THE NORTHERN CITIES TECHNICAL MEMORANDUM. September 9, 2010. 8. Stetson Engineers, Inc. Lopez Lake Spillway Raise Project Report. February 2013. 9. Cannon. San Luis Obispo County Regional Recycled Water Strategic Plan. November 2014. 10. Water Systems Consulting, Inc. Recycled Water Facilities Planning Study for the City of Pismo Beach. April 2016. 11. Water Systems Consulting, Inc. Diablo Canyon Power Plant Desalination Hydraulic Feasibility Analysis FINAL DRAFT – DCPP DESALINATION PIPELINE FEASIBILITY STUDY Technical Memorandum. March 2016. 12. Todd Engineers. Water Balance Study for the Northern Cities Area. April 2007. 13. Carollo Engineers. San Luis Obispo County Master Water Report. May 2012. 14. Lisa Wise Consulting. City of Arroyo Grande Housing Element Public Review Draft. December 2015. 15. City of Arroyo Grande. Fringe and Urban Area Land Use Element. 2001. 16. City of Arroyo Grande in Association with Water Systems Consulting, Inc. Water System Master Plan. December 2012. City of Arroyo Grande 9. References 2015 Urban Water Management Plan - Final Draft 9-2 17. California Department of Water Resources. 2015 Urban Water Management Plans Guidebook for Urban Water Suppliers. March 2016. 18. —. Methodologies for Calculating Baseline and Compliance Urban Per Capita Water Use. February 2016. 19. Steve Tanaka, PE & Valerie Huff, PE. Recycled Water Distribution System Conceptual Plan- South San Luis Obispo County Sanitation District WWTP. s.l. : Wallace Group, June 2010. 20. City of Arroyo Grande. Recycled Water Distribution System Conceptual Plan Technical Memorandum. April 2010. 21. San Luis Obispo Council of Governments. Regional Housing Needs Plan. June 2013. 22. Prepared for San Luis Obispo Council of Governments by AECOM Technical Services. San Luis Obispo County 2040 Population, Housing & Employment Forecast. June 24, 2011. 23. Wallace Group. Zone 3 Urban Water Management Plan 2015 Update. s.l. : San Luis Obispo County Flood Control and Water Conservation District, June 2016. 24. San Luis Obispo County Flood Control and Water Conservation District. San Luis County 2014 Integrated Regional Water Management Plan. July 2014. 25. Tuckfield & Associates. Water and Wastewater Financial Plan and Rate Study. March 2009. 26. Todd Engineers. Water Balance Study for the Northern Cities Area. April 2007. 27. Cleath & Associates. Ground Water Source Assessment Los Robles Del Mar Project Pismo Beach. August 2003. 28. Fugro Consultants, Inc. Northern Cities Management Area 2015 Annual Montitoring Report. April 2016. 29. Resources, California Department of Water. California's Groundwater Bulletin 118 Update 2003. October 2003. 30. —. California Water Plan Update Bulletin 160-98. November 1998. 31. City of Arroyo Grande. Wastewater System Master Plan. December 2012. 32. Wallace Group. - Recycled Water Distribution System Conceptual Plan- South San Luis Obispo County Sanitation District WWTP Technical Memorandum. June 2010. 33. —. Recycled Water Distribution System Conceptual Plan- City of Pismo Beach WWTP Technical Memorandum. June 2010. 34. Water Systems Consulting, Inc. City of Pismo Beach 2015 Urban Water Management Plan. June 2016. City of Arroyo Grande 9. References 2015 Urban Water Management Plan - Final Draft 9-3 35. 3, San Luis Obispo County Flood Control and Water Conservation District Zone. Low Reservoir Response Plan. December 16, 2014. 36. Wallace Group. Draft Urban Water Management Plan Update. June 2016. 37. City of Arroyo Grande. Wastewater System Master Plan. November 13, 2001. City of Arroyo Grande Appendix A. DWR Checklist 2015 Urban Water Management Plan - Final Draft A APPENDIX A. DWR CHECKLIST CWC Section UWMP Requirement Subject Guidebook Location UWMP Location 10620(b) Every person that becomes an urban water supplier shall adopt an urban water management plan within one year after it has become an urban water supplier. Plan Preparation Section 2.1 2.2 10620(d)(2) Coordinate the preparation of its plan with other appropriate agencies in the area, including other water suppliers that share a common source, water management agencies, and relevant public agencies, to the extent practicable. Plan Preparation Section 2.5.2 2.1 10642 Provide supporting documentation that the water supplier has encouraged active involvement of diverse social, cultural, and economic elements of the population within the service area prior to and during the preparation of the plan. Plan Preparation Section 2.5.2 2.1 10631(a) Describe the water supplier service area. System Description Section 3.1 3.1 10631(a) Describe the climate of the service area of the supplier. System Description Section 3.3 3.2 10631(a) Provide population projections for 2020, 2025, 2030, and 2035. System Description Section 3.4 3.3 10631(a) Describe other demographic factors affecting the supplier’s water management System Description Section 3.4 3.3 10631(a) Indicate the current population of the service area. System Description and Baselines and Targets Sections 3.3 and 5.4 10631(e)(1) Quantify past, current, and projected water use, identifying the uses among water use sectors. System Water Use Section 4.2 4.2 10631(e)(3)(A) Report the distribution system water loss for the most recent 12-month period available. System Water Use Section 4.3 4.2.3; Appendix E 10631.1(a) Include projected water use needed for lower income housing projected in the service area of the supplier. System Water Use Section 4.5 4.2.1 10608.20(b) Retail suppliers shall adopt a 2020 water use target using one of four methods. Baselines and Targets Section 5.7 and App E 4.1 City of Arroyo Grande Appendix A. DWR Checklist 2015 Urban Water Management Plan - Final Draft A CWC Section UWMP Requirement Subject Guidebook Location UWMP Location 10608.20(e) Retail suppliers shall provide baseline daily per capita water use, urban water use target, interim urban water use target, and compliance daily per capita water use, along with the bases for determining those estimates, including references to supporting data. Baselines and Targets Chapter 5 and App E 4.1 10608.22 Retail suppliers’ per capita daily water use reduction shall be no less than 5 percent of base daily per capita water use of the 5 year baseline. This does not apply is the suppliers base GPCD is at or below 100. Baselines and Targets Section 5.7.2 4.1 10608.24(a) Retail suppliers shall meet their interim target by December 31, 2015. Baselines and Targets Section 5.8 and App E 4.1 1608.24(d)(2) If the retail supplier adjusts its compliance GPCD using weather normalization, economic adjustment, or extraordinary events, it shall provide the basis for, and data supporting the adjustment. Baselines and Targets Section 5.8.2 N/A 10608.36 Wholesale suppliers shall include an assessment of present and proposed future measures, programs, and policies to help their retail water suppliers achieve targeted di Baselines and Targets Section 5.1 N/A 10608.4 Retail suppliers shall report on their progress in meeting their water use targets. The data shall be reported using a standardized form. Baselines and Targets Section 5.8 and App E 4.1 10631(b) Identify and quantify the existing and planned sources of water available for 2015, 2020, 2025, 2030, and 2035. System Supplies Chapter 6 0 10631(b) Indicate whether groundwater is an existing or planned source of water available to the supplier. System Supplies Section 6.2 5.2 10631(b)(1) Indicate whether a groundwater management plan has been adopted by the water supplier or if there is any other specific authorization for groundwater management. Include a copy of the plan or authorization. System Supplies Section 6.2.2 5.2.3 10631(b)(2) Describe the groundwater basin. System Supplies Section 5.2 City of Arroyo Grande Appendix A. DWR Checklist 2015 Urban Water Management Plan - Final Draft A CWC Section UWMP Requirement Subject Guidebook Location UWMP Location 10631(b)(2) Indicate if the basin has been adjudicated and include a copy of the court order or decree and a description of the amount of water the supplier has the legal right to System Supplies Section 6.2.2 5.2.3; Appendix G 10631(b)(2) For unadjudicated basins, indicate whether or not the department has identified the basin as overdrafted, or projected to become overdrafted. Describe efforts by the supplier to eliminate the long-term overdraft condition. System Supplies Section 6.2.3 5.2.5 10631(b)(3) Provide a detailed description and analysis of the location, amount, and sufficiency of groundwater pumped by the urban water supplier for the past five years System Supplies Section 6.2.4 5.2.6 10631(b)(4) Provide a detailed description and analysis of the amount and location of groundwater that is projected to be pumped. System Supplies Sections 5.2.6 and 6.9 10631(d) Describe the opportunities for exchanges or transfers of water on a short-term or long- term basis. System Supplies Section 6.7 5.3 10631(g) Describe the expected future water supply projects and programs that may be undertaken by the water supplier to address water supply reliability in average, single- dry, and multiple-dry years. System Supplies Section 6.8 5.6 10631(i) Describe desalinated water project opportunities for long-term supply. System Supplies Section 6.6 5.4 10631(j) Retail suppliers will include documentation that they have provided their wholesale supplier(s) – if any - with water use projections from that source. System Supplies Section 2.5.1 4.3 10631(j) Wholesale suppliers will include documentation that they have provided their urban water suppliers with identification and quantification of the existing and planned sources of water available from the wholesale to the urban supplier during various water year types. System Supplies Section 2.5.1 N/A 10633 For wastewater and recycled water, coordinate with local water, wastewater, groundwater, and planning agencies that operate within the supplier's service area. System Supplies (Recycled Water) Section 6.5.1 5.5 City of Arroyo Grande Appendix A. DWR Checklist 2015 Urban Water Management Plan - Final Draft A CWC Section UWMP Requirement Subject Guidebook Location UWMP Location 10633(a) Describe the wastewater collection and treatment systems in the supplier's service area. Include quantification of the amount of wastewater collected and treated and the methods of wastewater disposal. System Supplies (Recycled Water) Section 6.5.2 5.5.1 10633(b) Describe the quantity of treated wastewater that meets recycled water standards, is being discharged, and is otherwise available for use in a recycled water project. System Supplies (Recycled Water) Section 6.5.2.2 5.5.1 10633(c) Describe the recycled water currently being used in the supplier's service area. System Supplies (Recycled Water) Section 5.5.3 and 6.5.4 10633(d) Describe and quantify the potential uses of recycled water and provide a determination of the technical and economic feasibility of those uses. System Supplies (Recycled Water) Section 6.5.4 5.5.3 10633(e) Describe the projected use of recycled water within the supplier's service area at the end of 5, 10, 15, and 20 years, and a description of the actual use of recycled water in comparison to uses previously projected. System Supplies (Recycled Water) Section 6.5.4 5.5.3 10633(f) Describe the actions which may be taken to encourage the use of recycled water and the projected results of these actions in terms of acre-feet of recycled water used per year. System Supplies (Recycled Water) Section 6.5.5 5.5.3 10633(g) Provide a plan for optimizing the use of recycled water in the supplier's service area. System Supplies (Recycled Water) Section 6.5.5 5.5.3 10620(f) Describe water management tools and options to maximize resources and minimize the need to import water from other regions. Water Supply Reliability Assessment Section 7.4 6.2.6 10631(c)(1) Describe the reliability of the water supply and vulnerability to seasonal or climatic shortage. Water Supply Reliability Assessment Section 7.1 6.2.7 10631(c)(1) Provide data for an average water year, a single dry water year, and multiple dry water years Water Supply Reliability Assessment Section 7.2 6.2.1 City of Arroyo Grande Appendix A. DWR Checklist 2015 Urban Water Management Plan - Final Draft A CWC Section UWMP Requirement Subject Guidebook Location UWMP Location 10631(c)(2) For any water source that may not be available at a consistent level of use, describe plans to supplement or replace that source. Water Supply Reliability Assessment Section 7.1 6.2.6 10634 Provide information on the quality of existing sources of water available to the supplier and the manner in which water quality affects water management strategies and supply reliability Water Supply Reliability Assessment Section 7.1 6.2.7 10635(a) Assess the water supply reliability during normal, dry, and multiple dry water years by comparing the total water supply sources available to the water supplier with the total projected water use over the next 20 years. Water Supply Reliability Assessment Section 7.3 6.2.2; 6.2.3; 6.2.4 10632(a) and 10632(a)(1) Provide an urban water shortage contingency analysis that specifies stages of action and an outline of specific water supply conditions at each stage. Water Shortage Contingency Planning Section 8.1 7 10632(a)(2) Provide an estimate of the minimum water supply available during each of the next three water years based on the driest three- year historic sequence for the agency. Water Shortage Contingency Planning Section 8.9 6.2.5 10632(a)(3) Identify actions to be undertaken by the urban water supplier in case of a catastrophic interruption of water supplies. Water Shortage Contingency Planning Section 8.8 7.2 10632(a)(4) Identify mandatory prohibitions against specific water use practices during water shortages. Water Shortage Contingency Planning Section 8.2 0 10632(a)(5) Specify consumption reduction methods in the most restrictive stages. Water Shortage Contingency Planning Section 8.4 7.4 10632(a)(6) Indicated penalties or charges for excessive use, where applicable. Water Shortage Contingency Planning Section 8.3 7.5 10632(a)(7) Provide an analysis of the impacts of each of the actions and conditions in the water shortage contingency analysis on the revenues and expenditures of the urban water supplier, and proposed measures to overcome those impacts. Water Shortage Contingency Planning Section 8.6 7.6 City of Arroyo Grande Appendix A. DWR Checklist 2015 Urban Water Management Plan - Final Draft A CWC Section UWMP Requirement Subject Guidebook Location UWMP Location 10632(a)(8) Provide a draft water shortage contingency resolution or ordinance. Water Shortage Contingency Planning Section 8.7 7.7; Appendix H 10632(a)(9) Indicate a mechanism for determining actual reductions in water use pursuant to the water shortage contingency analysis. Water Shortage Contingency Planning Section 8.5 7.8 10631(f)(1) Retail suppliers shall provide a description of the nature and extent of each demand management measure implemented over the past five years. The description will address specific measures listed in code. Demand Management Measures Sections 8 and 9.3 10631(f)(2) Wholesale suppliers shall describe specific demand management measures listed in code, their distribution system asset management program, and supplier assistance program. Demand Management Sections N/A and 9.3 10631(j) CUWCC members may submit their 2013- 2014 CUWCC BMP annual reports in lieu of, or in addition to, describing the DMM implementation in their UWMPs. This option is only allowable if the supplier has been found to be in full compliance with the CUWCC MOU. Demand Management Measures Section 9.5 N/A 10608.26(a) Retail suppliers shall conduct a public hearing to discuss adoption, implementation, and economic impact of water use targets. Plan Adoption, Submittal, and Implementation Section 10.3 2.2; Appendix B 10621(b) Notify, at least 60 days prior to the public hearing, any city or county within which the supplier provides water that the urban water supplier will be reviewing the plan and considering amendments or changes to the plan. Plan Adoption, Submittal, and Implementation Section 10.2.1 2.2; Appendix B 10621(d) Each urban water supplier shall update and submit its 2015 plan to the department by July 1, 2016. Plan Adoption, Submittal, and Implementation Sections 2.2; Appendix B 10.3.1 and 10.4 City of Arroyo Grande Appendix A. DWR Checklist 2015 Urban Water Management Plan - Final Draft A CWC Section UWMP Requirement Subject Guidebook Location UWMP Location 10635(b) Provide supporting documentation that Water Shortage Contingency Plan has been, or will be, provided to any city or county within which it provides water, no later than 60 days after the submission of the plan to DWR. Plan Adoption, Submittal, and Implementation Section 10.4.4 2.2; Appendix B 10642 Provide supporting documentation that the urban water supplier made the plan available for public inspection, published notice of the public hearing, and held a public hearing about the plan. Plan Adoption, Submittal, and Implementation Sections 10.2.2, 2.2; Appendix B and 10.5 10642 The water supplier is to provide the time and place of the hearing to any city or county within which the supplier provides water. Plan Adoption, Submittal, and Implementation Sections 10.2.1 2.2; Appendix B 10642 Provide supporting documentation that the plan has been adopted as prepared or modified. Plan Adoption, Submittal, and Implementation Section 10.3.1 2.2; Appendix B 10644(a) Provide supporting documentation that the urban water supplier has submitted this UWMP to the California State Library. Plan Adoption, Submittal, and Implementation Section 10.4.3 2.2; Appendix B 10644(a)(1) Provide supporting documentation that the urban water supplier has submitted this UWMP to any city or county within which the supplier provides water no later than 30 days after adoption. Plan Adoption, Submittal, and Implementation Section 10.4.4 2.2; Appendix B 10644(a)(2) The plan, or amendments to the plan, submitted to the department shall be submitted electronically. Plan Adoption, Submittal, and Implementation Sections 2.2; Appendix B 10.4.1 and 10.4.2 10645 Provide supporting documentation that, not later than 30 days after filing a copy of its plan with the department, the supplier has or will make the plan available for public review during normal business hours. Plan Adoption, Submittal, and Implementation Section 10.5 2.2; Appendix B City of Arroyo Grande Appendix B. Notification and Outreach Materials 2015 Urban Water Management Plan - Final Draft B APPENDIX B. NOTIFICATION AND OUTREACH MATERIALS To be included upon completion of the Final Draft UWMP. City of Arroyo Grande Appendix C. Letter of Adoption 2015 Urban Water Management Plan - Final Draft C APPENDIX C. LETTER OF ADOPTION To be included upon completion of the Final UWMP. City of Arroyo Grande Appendix D. BASELINE DAILY PER CAPITA WATER USE AND TARGET WATER USE TM – REVISED DRAFT 2015 Urban Water Management Plan - Final Draft D APPENDIX D. BASELINE DAILY PER CAPITA WATER USE AND TARGET WATER USE TM – REVISED DRAFT City of Arroyo Grande 2015 Urban Water Management Plan Baseline Daily Per capita Water Use and Target Water Use – Revised Draft 1 Date: 5/5/2016 To: Shane Taylor Phone: (805) 473-5464 City of Arroyo Grande PO Box 550 1375 Ash Street Arroyo Grande, CA 93421 Prepared by: Spencer Waterman Project: City of Arroyo Grande 2015 Urban Water Management Plan SUBJECT: BASELINE DAILY PER CAPITA WATER USE AND TARGET WATER USE – REVISED DRAFT This memorandum presents the procedure used by the City of Arroyo Grande (City) to meet the requirements of Senate Bill x 7-7 (SB7) as defined in the Water Conservation Act of 2009 and incorporated into Division 6 of the California Water Code, commencing with Section 10608 of Part 2.55. Background On November 10, 2009, Governor Arnold Schwarzenegger signed Senate Bill x 7-7 into law. The legislation requires all water suppliers to achieve a reduction in per capita water use of 20% by December 31, 2020, with an interim target of 10% reduction by December 31, 2015. The legislation requires each urban water supplier to develop, and include in its Urban Water Management Plans (UWMPs), estimates of: 1) baseline daily per capita water use; 2) daily per capita water use target; 3) daily per capita water use interim target; 4) compliance daily per capita water use; and 5) confirmation that the target meets the minimum water use reduction requirement. The UWMP must also include bases for determining the estimates, with references to supporting data. However, SB 7 did not include a detailed description of the allowable methodologies for determining the required values. Instead, it required California Department of Water Resources (DWR) to develop appropriate methodologies and criteria, and to make them available to water suppliers no later than October 1, 2010. In consideration of this delay, the bill extended the deadline for adoption of the 2010 UWMP to July 1, 2011. In connection with preparation of the 2010 and 2015 UWMPs, the City hired Water Systems Consulting, Inc. (WSC) to develop the required estimates described by SB 7. WSC applied methodologies consistent with those described in the Methodologies for Calculating Baseline and Compliance Urban Per Capita Water Use guidebook (Methodologies Guidebook). The procedure used to develop the required SB7 estimates includes the following basic steps: 1. Calculate baseline water use, which is the average gross daily water use per capita, reported in gallons per capita per day, based on gross water use and service area population for a continuous 10-year period ending no earlier than December 31, 2004. 2. Calculate the urban water use target using one of the four methods described below 2 3. Check and confirm targets using a selected five-year running average ending no earlier than December 31, 2007 and no later than December 31, 2010. 4. Calculate the interim urban water use target (equal to the average of the baseline and confirmed urban water use target) 5. Calculate the compliance daily per capita water use (equal to the gross daily water use per capita during the final year of the reporting period (i.e. 2010)) DWR allows the urban water supplier to choose one of four different methods to calculate the urban water use target in Step 2 above.  Method 1 involves calculating the target based on 80% of baseline daily per capita water use and the interim target based on 90% of the baseline daily per capita water use.  Method 2 involves calculating the per capita daily water use by using the sum of performance standards applied to indoor residential use, landscaped area water use, and commercial, industrial, and institutional uses.  Method 3 calculates the water use target as 95% of the applicable state hydrologic region target as stated in the 20x2020 Water Conservation Plan. The City’s service area is located in the Central Coast hydrologic region number 3 as defined in the State’s 20x2020 Water Conservation Plan.  Method 4 is an approach developed by DWR to estimate water savings factors associated with implementation of various conservation measures. The water savings factors are used to calculate water use targets. Appendix A and Appendix B show the input and calculation spreadsheets for Method 4. Gross Water Use SB 7 defines gross water use as: “The total volume of water, whether treated or untreated, entering the distribution system of an urban retail water supplier, excluding all of the following: (1) Recycled water that is delivered within the service area of an urban retail water supplier or its urban wholesale water supplier; (2) The net volume of water that the urban retail water supplier places into long-term storage; (3) The volume of water the urban retail water supplier conveys for use by another urban water supplier.; (4) The volume of water delivered for agricultural use, except as otherwise provided in subdivision (f) of Section 10608.24.” Groundwater and surface water are the only sources of water for the City. From 1995 through present, the City has not stored any water long-term or sold any water to other agencies. Therefore, gross water use is calculated as the sum of the City’s total surface water purchases and groundwater production. Population The first step in determining the service area population involves establishing the service area boundary and the customers served within that boundary. WSC worked with City Staff to establish the location of customer connections outside of City limits served by the City and connections within the City limits not served by the City. WSC then plotted these connections as points in a map using Geographical Information Systems (GIS) 3 software. The points contain spatial data linked to a geodatabase with information about each connection. Figure 1 shows the connections located within City limits served by Oceano Community Services District (OCSD) and connections located outside of City limits served by the City. 4 Figure 1. City of Arroyo Grande Water Service Area 5 To estimate the total population served by the City, WSC subtracted the population within City limits served by OCSD and added the population outside of City limits served by the City to the 2010 Census population. Table 1. Water Service Area Population Population Area Source 2010 Connections 2010 Population City Limits Census n/a 17,252 Inside City Limits Served by OCSD Water City Staff & Land Use Element 138 1 368 2 Inside City Limits Served by City Water Calculation (City Limits Census Pop. minus Pop. Served by OCSD) n/a 16,884 Outside City Limits Served by City Water City Staff & Land Use Element 9 1 24 2 Total Water Service Area Calculation (Inside City Limits Pop. plus Outside City Limits Pop.) n/a 16,908 1 The connections were identified and provided by City Staff. 2 Assumes a persons per residential connection factor of 2.67. City Staff estimate the service area population each year for the Department of Water Resources Public Water System Statistics report (DWR reports). The methodology used by City staff to calculate service area population is very similar to the methodology WSC used to develop its 2010 population estimate based on the DWR Population Tool. City Staff historically calculated the service area population by applying 2.4 persons per household to the number of residential connections served by OCSD in each year and subtracting that population from the City limits population. The population estimated in the 2010 DWR report is 16,901, a difference of 0.04% from WSC’s estimate of 16,908. Historical Population Because Census data is not available for interim years between 1990, 2000 and 2010, historical population is interpolated between non-census years for each year from 1995 through 2010. Figure 2 shows the historical population. 6 Figure 2. Historical Population Projected Population The San Luis Obispo Council of Governments (SLOCOG) develops population projections for San Luis Obispo County and the cities and communities within the County. SLOCOG projects the population for the City through 2040 in its San Luis Obispo County 2040 Population, Housing & Employment Forecast (1). The projections are based on a comprehensive study of historical population trends for California and the County, short-term and long-term population reports, economic conditions, and consultation with planners from the County. The report presents three growth scenarios: low, mid, and high. For the purposes of projecting population, WSC used the mid growth scenario population projections from SLOCOG’s report to develop annual growth rates through 2035. 2015 population was calculated by applying the 2010 persons per connection factor of 2.67 to the total number of connections in 2015. The annual growth rates are applied to the 2015 population to yield the projected populations shown in Table 2. The build-out population, defined as the maximum population that can occur considering the zoning and land use designations of the current General Plan, is established at 20,000 persons based on the City’s General Plan Housing Element. Table 2. Service Area Population Projections 2010 2015 2020 2025 2030 2035 Population 16,908 17,636 18,524 19,054 19,716 20,000 Annual Growth Rate % n/a 0.52% 0.99% 0.57% 0.69% 13,500 14,000 14,500 15,000 15,500 16,000 16,500 17,000 17,500 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 Po p u l a t i o n Distribution System Population 7 Baseline Per Capita Water Use WSC calculated per capita water use using gross water use values and the population estimates shown in Table 3. The annual per capita water use value was averaged across 10-year periods ranging from 1995-2004 through 2001-2010. Figure 3 shows the historical population estimates, along with the annual per capita water use for the years 1995 through 2010. Table 3. Baseline Daily Per Capita Water Use Calendar Year Distribution System Population Daily System Gross Water Use (mgd) Annual Daily Per Capita Water Use (gpcd) 10 year running average (gpcd) 1995 14,951 2.3 157 1996 15,062 2.5 166 1997 15,173 2.8 182 1998 15,284 2.5 162 1999 15,396 2.8 184 2000 15,507 3.0 195 2001 15,647 2.9 188 2002 15,787 3.1 198 2003 15,927 3.1 197 2004 16,067 3.2 200 183 2005 16,208 3.0 188 186 2006 16,348 3.0 182 187 2007 16,488 3.2 194 189 2008 16,628 3.1 189 191 2009 16,768 2.9 173 190 2010 16,908 2.6 156 187 Baseline Daily Per Capita Water Use 191 8 Figure 3. Population and Historical Per Capita Water Use Water Use Targets The baseline daily per capita water use is used to calculate the urban water use target and the interim urban water use target. The per capita water use target and interim target estimates are calculated using Method 1, Method 3, and Method 4 from the Methodologies Guidebook. Method 2 was not used due to a lack of available data. Table 4 shows the estimated daily per capita water use targets for each method analyzed. Table 4. Daily Per Capita Water Use Targets Calculation Method Water Use Target (gpcd) Method 1: 80% of Baseline Per Capita Water Use 153.2 Method 2: Performance Standards Not calculated Method 3: 95% of Regional Target 117.0 Method 4: DWR Approach 152.7 Selected Urban Water Use Target 153.2 157 166 182 162 184 195 188 198 197 200 188 182 194 189 173 156 100 150 200 250 300 350 13,500 14,000 14,500 15,000 15,500 16,000 16,500 17,000 17,500 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 Av e r a g e P e r C a p i t a W a t e r U s e ( g p c d ) Po p u l a t i o n Distribution System Population Average Per Capita Water Use (gpcd) 9 Minimum Water Use Reduction Requirements The selected target must be less than 95% of a selected five-year running average ending no earlier than December 31, 2007 and ending no later than December 31, 2010 per the requirements of California Water Code Section 10608.22. Table 5 shows the minimum water use reduction based on five-year running averages. Table 6 shows the confirmation that the selected target meets the minimum water use reduction. Table 7 shows the final baseline, compliance, interim target, and target per capita water use. Table 8 shows the status of meeting the interim target and target based on current compliance per capita water use. Figure 4 shows the past, current and projected per capita water use for the City. The projected gpcd for interim years between 2016 and 2020 was calculated uniquely. It is assumed that the low gpcd experienced in 2015 was a result of multiple temporary factors, such as the economy, wet year hydrologic conditions, emergency drought regulations, and others. To account for this artificially low gpcd, it is assumed that the 2020 gpcd will be approximately 7% less than the five-year historical average gpcd from 2011-2015 based on City Staff input. The interim years between 2016 and 2020 were calculated through linear interpolation between the 2020 and 2015 water use. Lastly, the years following 2020 were assumed to stay the same through buildout. The values shown will be reported in the City’s 2015 UWMP. Table 5. Minimum Water Use Reduction Calendar Year Distribution System Population Daily System Gross Water Use (mgd) Annual Daily Per Capita Water Use (gpcd) 5 year running average 2003 15,927 3.1 197 2004 16,067 3.2 200 2005 16,208 3.0 188 2006 16,348 3.0 182 2007 16,488 3.2 194 192 2008 16,628 3.1 189 190 2009 16,768 2.9 173 185 2010 16,908 2.6 156 179 5-yr Baseline Daily Per Capita Water Use 192 Table 6. Target Confirmation Selected Urban Water Use Target (gpcd) 153 95% of 5-year Base Daily Per Capita Water Use (gpcd) 183 Selected Urban Water Use Target < 95% of 5-year Base GPCD Yes Confirmed Urban Water Use Target, 2020 (gpcd) 153 10 Table 7. Baseline, Compliance, Interim Target, and Target Water Use Parameter Water Use (gpcd) Baseline Daily Per Capita Water Use 191 2010 Daily Per Capita Water Use 113 2015 Interim Urban Water Use Target 172 2020 Urban Water Use Target 153 Table 8. Water Use Reduction Status Water Use Reduction (on gpcd basis) % Reduction1 Achieved by 2015 40.8% Needed to meet 2015 target -52.0% Needed to meet 2020 target -35.1% 1 A negative % means the compliance is currently lower than the target. Figure 4. Historical, Current, and Project Per Capita Water Use 172 153 191 7% Reduction from 2011-2015 Average= 135 gpcd 135 100 120 140 160 180 200 220 19 9 6 19 9 8 20 0 0 20 0 2 20 0 4 20 0 6 20 0 8 20 1 0 20 1 2 20 1 4 20 1 6 20 1 8 20 2 0 20 2 2 20 2 4 20 2 6 20 2 8 20 3 0 Wa t e r U s e ( G a l l o n s / C a p i t a / D a y ) Interim Target (2015)Target (2020)Baseline Projected Use (gpcd)Historical Use (gpcd) 11 Appendix A. User Input- Method 4 12 Appendix B. Calculator-Method 4 City of Arroyo Grande Appendix E. AWWA Water Loss Audit 2015 Urban Water Management Plan - Final Draft E APPENDIX E. AWWA WATER LOSS AUDIT Water Audit Report for: Reporting Year: PLEASE CHOOSE REPORTING UNITS FROM THE INSTRUCTIONS SHEET BEFORE ENTERING DATA Master Meter and Supply Error Adjustments WATER SUPPLIED Pcnt: Value: Volume from own sources:9 86.800 Water imported:9 2,152.200 Water exported:9 Enter negative % or value for under-registration WATER SUPPLIED:2,239.000 Enter positive % or value for over-registration . AUTHORIZED CONSUMPTION Billed metered:9 2,106.300 Billed unmetered:9 Unbilled metered:9 Pcnt: Value: Unbilled unmetered:5 27.988 1.25% AUTHORIZED CONSUMPTION:2,134.288 WATER LOSSES (Water Supplied - Authorized Consumption)104.713 Apparent Losses Pcnt: Value: Unauthorized consumption: 5.598 0.25% Customer metering inaccuracies:8 0.000 Systematic data handling errors:7 5.266 0.25% Apparent Losses:10.863 Real Losses (Current Annual Real Losses or CARL) Real Losses = Water Losses - Apparent Losses:93.849 WATER LOSSES:104.713 NON-REVENUE WATER NON-REVENUE WATER:132.700 = Water Losses + Unbilled Metered + Unbilled Unmetered SYSTEM DATA Length of mains:7 87.5 Number of active AND inactive service connections:7 6,605 Service connection density: 75 Yes Average length of customer service line: Average operating pressure:7 65.0 COST DATA Total annual cost of operating water system:8 $1,328,115 $/Year Customer retail unit cost (applied to Apparent Losses):8 $3.50 Variable production cost (applied to Real Losses):8 $1,458.00 $/ WATER AUDIT DATA VALIDITY SCORE: PRIORITY AREAS FOR ATTENTION: 1: Water imported 2: Unauthorized consumption 3: Systematic data handling errors Average length of customer service line has been set to zero and a data grading score of 10 has been applied Are customer meters typically located at the curbstop or property line? AWWA Free Water Audit Software: Reporting Worksheet Default option selected for Unbilled unmetered - a grading of 5 is applied but not displayed << Please enter system details and contact information on the Instructions tab >> *** YOUR SCORE IS: 81 out of 100 *** A weighted scale for the components of consumption and water loss is included in the calculation of the Water Audit Data Validity Score Default option selected for Systematic data handling errors - a grading of 5 is applied but not displayed Based on the information provided, audit accuracy can be improved by addressing the following components: $/100 cubic feet (ccf) <----------- Enter grading in column 'E' and 'J' ----------> Default option selected for unauthorized consumption - a grading of 5 is applied but not displayed ? ? ? ? ? ?Click to access definition ? ? ? ? ? ? Please enter data in the white cells below. Where available, metered values should be used; if metered values are unavailable please estimate a value. Indicate your confidence in the accuracy of the input data by grading each component (n/a or 1-10) using the drop-down list to the left of the input cell. Hover the mouse over the cell to obtain a description of the grades ? ? ? ? ? ? (length of service line, beyond the property boundary, that is the responsibility of the utility) Use buttons to select percentage of water supplied OR value ?Click here: for help using option buttons below ? ? ? ? + +Click to add a comment WAS v5.0 + + + + + + American Water Works Association. ? ? ? + + + + + + + + + + + + +Use Customer Retail Unit Cost to value real losses ? To select the correct data grading for each input, determine the highest grade where the AWWA Free Water Audit Software v5.0 Reporting Worksheet 1 City of Arroyo Grande Appendix F. Selected Figures from the NCMA 2015 Annual Monitoring Report 2015 Urban Water Management Plan - Final Draft F APPENDIX F. SELECTED FIGURES FROM THE NCMA 2015 ANNUAL MONITORING REPORT P a c i f i cOcean £¤101UV1 UV1 Santa Maria ValleyManagement Area Nipomo MesaManagement Area NorthernCitiesManagementArea Northern Cities Managem ent AreaProject No. 04.62150079 SANTA MARIA GROUNDWATER BASINNorthern Cities Management AreaSan Luis Obispo County, California FIGURE 1 Ü 0 51234Miles Legend Northern CitiesManagement Area Adjudication Area Boundary Santa Maria Groundwater Basin(DWR Bulletin 118) Service Layer Credits: Sources: Esri, HERE, DeLorme, USGS, Intermap,increment P Corp., NRCAN, Esri Japan, METI, Esri China (Hong Kong), Esri(Thailand), MapmyIndia, © OpenStreetMap contributors, and the GIS UserCommunity \\V e n w e s t 1 0 \D a t a 5 \P r o j e c t s \0 4 _2 0 1 4 \0 4 _6 2 1 4 _0 1 0 5 _N C M A _2 0 1 4 A n n u a l R e p o r t \O u t p u t s \2 0 1 4 _N C M A _A n n u a l _M o n i t o r i n g _R e p o r t \m x d \F i g u r e 1 S a n t a M a r i a G r o u n d w a t e r B a s i n .m x d , 0 4 /0 1 /1 5 , t n i c e l y AN N U A L P R E C I P I T A T I O N 1 9 5 0 T O 2 0 1 5 No r t h e r n C i t i e s M a n a g e m e n t A r e a Sa n L u i s O b i s p o C o u n t y , C a l i f o r n i a Northern Cities Management Area Project No. 04.62150079 FIGURE 3 Northern Cities Management Area Project No. 04.62150079 MONTHLY 2015 AND AVERAGE PRECIPITATION AND EVAPOTRANSPIRATION Northern Cities Management Area San Luis Obispo County, California FIGURE 5 !A !A !A !A !A !APacific O c e a n £¤101 UV1 UV1 Oceano CSD Observation Wells(Green, Blue, Silver, and Yellow) Wells 32S/13E-30N01, N02, & N03 Wells 32S/13E-30F01, F02, & F03 Wells 32S/12E-24 B01, B02, & B03 Wells 12N/36W-36L01 & L02 Well 12N/35W-32C03 M e a d o w C r e e k Arroyo Grande Creek B e r r o s C re e k , L o s P i s m o C r e e k Sources: Esri, HERE, DeLorme, USGS, Intermap, increment PCorp., NRCAN, Esri Japan, METI, Esri China (Hong Kong), Esri(Thailand), MapmyIndia, © OpenStreetMap contributors, and theGIS User Community 120°34'0"W 120°34'0"W 120°36'0"W 120°36'0"W 120°38'0"W 120°38'0"W 3 5 °8 '0 "N 3 5 °8 '0 "N 3 5 °6 '0 "N 3 5 °6 '0 "N 3 5 °4 '0 "N 3 5 °4 '0 "N Northern Cities Managem ent AreaProject No. 04.62150079 LOCATION OF SENTRY WELLSNorthern Cities Management AreaSan Luis Obispo County, California FIGURE 6 Legend !'A NCMA Sentry Wells Northern Cities Management AreaCreeks \\V e n w e s t 1 0 \D a t a 5 \P r o j e c t s \0 4 _2 0 1 4 \0 4 _6 2 1 4 _0 1 0 5 _N C M A _2 0 1 4 A n n u a l R e p o r t \O u t p u t s \2 0 1 4 _N C M A _A n n u a l _M o n i t o r i n g _R e p o r t \m x d \F i g u r e 7 L o c a t i o n o f S e n t r y W e l l s .m x d , 0 4 /0 1 /1 5 , t n i c e l y Ü 0 4,000 Feet1:60,000 DE P T H S O F S E N T R Y W E L L S No r t h e r n C i t i e s M a n a g e m e n t A r e a Sa n L u i s O b i s p o C o u n t y , C a l i f o r n i a Northern Cities Management Area Technical Group Project No. 04.62150079 FIGURE 7 %P %P %P %P %P %P %P%P %P %P%P%P%P %P %P %P %P %P %P %P %P%P%P %P %P %P%P %P%P%P %P %P %P %P %P%P%P %P%P %P %P %P %P %P %P %P %P%P %P %P%P %P%P%P %P %P %P %P%P %P %P %P %P %P%P %P %P %P%P%P%P %P%P%P %P%P%P%P%P%P %P%P %P%P %P %P !A !A !A !A !A !A P a c i f i cOcean £¤101 UV1 UV1 M e a d o w C r e e k Arroyo Grande Creek B e r ro s C re e k , L o s P i s m o C r e e k Northern Cities Managem ent AreaProject No. 04.62150079 SELECTED HYDROGRAPHSNorthern Cities Management AreaSan Luis Obispo County, California Ü 0 1 2Miles 1 inch equals 1 mile Sources: Esri, HERE, DeLorme, USG S, Intermap,increment P Corp., NRCAN, Esri Japan, M ETI, Esri FIGURE 10 Legend !P Se lected We ll Location s North ern Cities Ma nage me nt Are a (NC MA) !A Se ntry We lls \\V e n w e s t 1 0 \D a t a 5 \P r o j e c t s \0 4 _2 0 1 4 \0 4 _6 2 1 4 _0 1 0 5 _N C M A _2 0 1 4 A n n u a l R e p o r t \O u t p u t s \2 0 1 4 _N C M A _A n n u a l _M o n i t o r i n g _R e p o r t \m x d \F i g u r e 1 1 S e l e c t e d H y d r o g r a p h s .m x d , 0 3 /1 7 /1 5 , t n i c e l y !A !A !A !A !A !A P a c i f i cOcean £¤101 UV1 UV1 M e a d o w C r e e k Arroyo Grande Creek B e r ro s C re e k , L o s P i s m o C r e e k Northern Cities Managem ent AreaProject No. 04.62150079 SENTRY WELL HYDROGRAPHSNorthern Cities Management AreaSan Luis Obispo County, California Ü 0 1 2Miles 1 inch equals 1 mile Sources: Esri, HERE, DeLorme, USG S, Intermap,increment P Corp., NRCAN, Esri Japan, M ETI, Esri FIGURE 11 Legend North ern Cities Ma nage me nt Are a (NC MA) !A Se ntry We lls \\V e n w e s t 1 0 \D a t a 5 \P r o j e c t s \0 4 _2 0 1 4 \0 4 _6 2 1 4 _0 1 0 5 _N C M A _2 0 1 4 A n n u a l R e p o r t \O u t p u t s \2 0 1 4 _N C M A _A n n u a l _M o n i t o r i n g _R e p o r t \m x d \F i g u r e 1 2 N C M A S e n t r y W e l l H y d r o g r a p h s .m x d , 0 3 /1 7 /1 5 , t n i c e l y HY D O G R A P H O F A V E R A G E D E E P SE N T R Y W E L L E L E V A T I O N S No r t h e r n C i t i e s M a n a g e m e n t A r e a Sa n L u i s O b i s p o C o u n t y , C a l i f o r n i a Northern Cities Management Area Project No. 04.62150079 FIGURE 12 No r t h e r n C i t i e s M a n a g e m e n t A r e a Pr o j e c t N o . 0 4 . 6 2 1 5 0 0 7 9 MUNICIPAL WATER USE BY SOURCE Northern Cities Management Area San Luis Obispo County, California J: \ W A T E R _ R E S O U R C E S \ N O R T H E R N C I T I E S \ 2 0 1 5 A N N U A L R E P O R T \ F I G U R E S \ U PD A T E D F I G U R E S \ F I G U R E 2 1 M U N I C I P A L W A T E R U S E B Y S O U R C E 1 1 X 1 7 . D OC X FIGURE 23 City of Arroyo Grande Appendix G. SMGB Groundwater Management Agreement 2015 Urban Water Management Plan - Final Draft G APPENDIX G. SMGB GROUNDWATER MANAGEMENT AGREEMENT JAN 2 5 2008 SUPERIOR COURT OF CALIFORNIA COUNTY OF SANTA CLARA SANTA MARIA VALLEY WATER CONSERVATION DISTRICT, Plaintiff, SANTA MARIA GROUNDWATER LITIGATION Lead Case No. 1-97-CV-770214 (CONSOLIDATED FOR ALL PURPOSES) VS. [Consolidated With Case Numbers: CITY OF SANTA MARIA, ET AL.. CV 784900; CV 785509; CV 785522; CV 787150; CV 784921; CV 78551 1; CV 785936; CV 787151; CV 784926; Defendants. CV 785515; CV 786791; CV 787152; 1-05-CV-0364101 I I 1 San Luis Obispo County Superior I AND RELATED CROSS-ACTIONS AND ACTIONS CONSOLIDATED FOR ALL PURPOSES Court Case Nds. 990738 and 990739 JUDGMENT AFTER TRIAL This matter came on for trial in five separate phases. Following the third phase of trial, a large number of parties entered into a written stipulation dated June 30, 2005 to resolve their 1 differences and requested that the cow approve the settlement and make its terms binding on 1 them as a part of any final judgment entered in this case. Subsequent to the execution of the stipulation by the original settling parties, a number of additional parties have agreed to be I I bound by the stipulation - their signatures are included in the attachments to this judgment. I Case No. 1-97-CV-770214 Judgment After Trial The June 30, 2005 Stipulation is attached as Exhibit "1;" and all exhibits to the ,tipulation are separately attached as Exhibits "1A" through "1H". The Stipulating Parties are ientified on Exhibit "IA." The court approves the Stipulation, orders the Stipulating Parties nly to comply with each and every term thereof, and incorporates the same herein as though et forth in full. No non-stipulating party is bound in any way by the stipulation except as the ourt may otherwise independently adopt as its independent judgment a term or terms that are le same or similar to such term or provision of the stipulation. As to all remaining parties, including those who failed to answer or otherwise appear, le court heard the testimony of witnesses, considered the evidence found to be admissible by le court, and heard the arguments of counsel. Good cause appearing, the court finds and rders judgment as follows. As used in this Judgment, the following terms shall have the meanings herein set forth: - The groundwater basin described in the Phase I and I1 orders of the court, as lodified, with attachments and presented in Exhibit "1B". Defaultinn Parties - All persons or entities listed on Exhibit "3". Imuorted Water - Water within the Basin received from the State Water Project, riginating outside the Basin, that absent human intervention would not recharge or be used in le Basin. LOG Parties - All persons or entities listed on Exhibit "2:" listed under the subheading LOG Parties". Non-Stipulatin~ Parties - All Parties who did not sign the Stipulation, including the )efaulting Parties and the LOG and Wineman Parties. Pavties - All parties to the above-referenced action, including Stipulating Parties, Non- tipulating Parties, and Defaulting Parties. Public Water Producers - City of Santa Maria, Golden State Water Company, Rural Vater Company, the "Northern Cities" (collectively the Cities of Arroyo Grande, Pismo teach, and Grover Beach, and Oceano Community Services District), and the Nipomo 'ommunity Services District. ase No. 1-97-CV-770214 ~dgment After Trial Return Flows - All water which recharges the Basin after in~tial use, through the use of percolation ponds and others means, derived from the use and recharge of imported water delivered through State Water Project facilities. Stipulating Parties - All Parties who are signatories to the Stipulation. Stipulation - The Stipulation dated June 30, 2005 and incorporated herein as Exhibit "1," with each of its Exhibits separately identified and incorporated herein as Exhibits "1A" through " 1 H". Storage Space - The portion of the Basin capable of holding water for subsequent reasonable and beneficial uses. W~nernan Parties - All persons or entities listed on Exhibit "2," under the subheading "Wineman Parties". The following Exhibits are attached to this Judgment: 1. Exhibit "I, "June 30, 2005 Stipulation and the following exhibits thereto: a. Exhibit "IA, " list identifying the Stipulating Parties and the parcels of land bound by the Stipulation. b. Exhibit "IB, " Phase I and I1 Orders, as modified, with attachments. c. Exhibit "IC," map of the Basin and boundaries of the three Management Areas. d. Exhibit "ID," map identifying those lands as of January I, 2005: 1) within the boundaries of a municipality or its sphere of influence, or within the process of inclusion in its sphere of influence; or 2) within the certificated service area of a publicly regulated utility; and a list of selected parcels that are nearby these boundaries which are excluded from within these areas. e. Exhibit "IE, " 2002 Settlement Agreement between the Northern Cities and Northern Landowners. f. Exhibit "IF," the agreement among Santa Maria, Golden State and Guadalupe regarding Twitchell Project and the Twitchell Management Authority. g. Exhibit "lG," the court's Order Concerning Electronic Service of Case No. 1-9743-7702 14 Judgment After Trial 'leadings and Electronic Posting of Discovery Documents dated June 27,2000. h. Exhibit "lH, " the form of memorandum of agreement to be recorded. 2. Exhibit "2, " List of Non-Stipulating LOG and Wineman Parties and recorded eed numbers of property they owned at the time of trial. 3. Exhibit "3, " List of Defaulting parties. A declaratory judgment and physical solution are hereby adjudged and decreed s follows: 1. As of the time of trial, LOG and Wineman Parties owned the real property, sted by assessor's parcel numbers, as presented in Exhibit 2. 2. The City of Santa Maria and Golden State Water Company are awarded rescriptive rights to ground water against the non-stipulating parties, which rights shall be leasured and enforced as described below. 3. The City of Santa Maria and Golden State Water Company have a right to use le Basin for temporary storage and subsequent recapture of the Return Flows generated from leir importation of State Water Project water, to the extent that such water adds to the supply f water in the aquifer and if there is storage space in the aquifer for such return flows, lcluding all other native sources of water in the aquifer. The City of Santa Maria's Return lows represent 65 percent of the amount of imported water used by the City. Golden State Vater Company's Return Flows represent 45 percent of the amount of imported water used by iolden State in the basin. 4. (a) The Northern Cities have a prior and paramount right to produce 7,300 acre- :et of water per year from the Northern Cities Area of the Basin; and (b) the Non-Stipulating arties have no overlying, appropriative, or other right to produce any water supplies in the Iorthern Cities Area of the Basin. 5. The Groundwater Monitoring Provisions and Management Area Monitoring rograms contained in the Stipulation, including Sections IV(D) (All Management Areas); '(B) (Santa Maria Management Area), VI(C) (Nipomo Mesa Management Area), and VII (1) Vorthern Cities Management Area), inclusive, are independently adopted by the court as ase No. I -97-CV-7702 14 ~dgment After Trial necessary to manage water production in the basin and are incorporated herein and made terms of this Judgment. The Non-Stipulating Parties shall participate in, and be bound by. the applicable Management Area Monitoring Program. Each Non-Stipulating Party also shall monitor their water production, maintain records thereof, and make the data available to the court or its designee as may be required by subsequent order of the court. 6. No Party established a pre-Stipulation priority right to any portion of that increment of augmented groundwater supply within the Basin that derives from the Twitchell Project's operation. 7. The court determines that there is a reasonable likelihood that drought and overdraft conditions will occur in the Basin in the foreseeable future that will require the exercise of the court's equity powers. The court therefore retains jurisdiction to make orders enforcing the rights of the parties hereto in accordance with the terms of this judgment. a. Groundwater I. The overlying rights of the LOG and Wineman Parties shall be adjusted by amounts lost to the City of Santa Maria and Golden State Water Company by prescription. The prescriptive rights of the City of Santa Maria and Golden State Water Company must be measured against the rights of all overlying water producers pumping in the acquifer as a whole and not just against the LOG and Wineman Parties because adverse pumping by the said water producers was from the aquifer as a whole and not just against the non-stipulating parties. The City of Santa Maria established total adverse appropriation of 5100 acre feet per year and Golden State Water Company established adverse appropriation of 1900 acre feet a year, measured against all usufructuary rights within the Santa Maria Basin. The City of Santa Maria and Goldcn State Water Company having waived the right to seek prescription against the other stipulating parties, may only assert such rights against the non stipulating parties in a proportionate quantity. To demonstrate the limited right acquired by the City of Santa Maria and Golden State Water Company, by way of example, if the cumulative usufructuary rights of the LOG and Wineman Parties were 1,000 acre-feet and the cumulative usufructuary rights of all other overlying groundwater right holders within the 5 Case No. 1-97-CV-770214 Judgment After Trial Basin were 100,000 acre-feet, the City of Santa Maria and Golden State Water Company would each be entitled to enforce 1% of their total prescriptive right against the LOG and Wineman Parties. That is, Golden State Water Company could assert a prescriptive right of 19 annual acre-feet, and the City of Santa Maria 51 annual acre-feet, cumulatively against the LOG and Wineman Parties, each on a proportionate basis as to each LOG and Wineman Party's individual use. ii. The Defaulting Parties failed to appear at trial and prove any usuhctuary water rights. The rights of the Defaulting Parties, if any, are subject to the prescriptive rights of the City of Santa Maria and Golden State Water Company, as well as the other rights of said parties as established herein. b. Imported Water The City of Santa Maria and Golden State Water Company shall have rights to Return Flows in the amount provided above. c. Northern Cities The rights of all Parties in the Northern Cities Management Area shall be governed as described above on page 4, lines 21 to 24. 8. The LOG and Wineman Parties have failed to sustain the burden of proof in their action to quiet title to the quantity of their ground water rights as overlying owners. All other LOG and Wineman party causes of action having been dismissed, judgment is hereby entered in favor of the Public Water Producers as to the quiet title causes of action brought by the LOG and the Wineman Parties. Legal title to said real property is vested in the Log and Wineman Parties and was not in dispute in this action. 9. Each and every Party, their officers, agents, employees, successors and assigns, are enjoined and restrained from exercising the rights and obligations provided through this Judgment in a manner inconsistent with the express provisions of this Judgment. 10. Except upon further order of the court. each and every Party and its officers, agents, employees, successors and assigns, is enjoined and restrained from transporting groundwater to areas outside the Basin, except for those uses in existence as of the date of this 6 Case No. 1-97-CV-7702 14 Judgment After Trial Judgment; provided, however. that groundwater may be delivered for use outside the Basin as long as the wastewater generated by that use of water is discharged within the Basin, or agricultural return flows resulting from that use return to the Basin. 11. Jurisdiction, power and authority over the Stipulating Parties as between one another are governed exclusively by the Stipulation. The court retains and reserves jurisdiction as set forth in this Paragraph over all parties hereto. The court shall make such further or supplemental orders as may be necessary or appropriate regarding interpretation and enforcement of all aspects of this Judgment, as well as clarifications or amendments to the Judgment consistent with the law. 12. Any party that seeks the court's exercise of reserved jurisdiction shall file a noticed motion with the court. Any noticed motion shall be made pursuant to the court's Order Concerning Electronic Service of Pleadings and Electronic Posting of Discovery Documents dated June 27,2000. 13. The court shall exercise de novo review in all proceedings. The actions or decisions of any Party, the Monitoring Parties, the TMA, or the Management Area Engineer shall have no heightened evidentiary weight in any proceedings before the court. 14. As long as the court's electronic filing system remains available, all court filings shall be made pursuant to court's Order Concerning Electronic Service of Pleadings and Electronic Posting of Discovery Documents dated June 27, 2000, or any subsequent superseding order. If the court's electronic filing system is eliminated and not replaced, the Parties shall promptly establish a substitute electronic filing system and abide by the same rules as contained in the court's Order. 15. Nothing in this Judgment shall be interpreted as relieving any Party of its responsibilities to comply with state or federal laws for the protection of water quality or the provisions of any permits, standards, requirements, or order promulgated thereunder. 16. Each Party shall designate the name, address and e-mail address, if any, to be used for purposes of all subsequent notices and service by a designation to be filed within thirty days after entry of this Judgment. This designation may be changed from time to time 7 Case No. 1-97-CV-770214 Judgment After Trial )y filing a written notice with the court. Any Party desiring to be relieved of receiving notices nay file a waiver of notice on a form approved by the court. The court shall maintain at all imes a current list of Parties to whom notices are to be sent and their addresses for purposes )f service. The court shall also maintain a full current list of names, addresses, and e-mail rddresses of all Parties or their successors, as filed herein. Copies of such lists shall be wailable to any Person. If no designation is made, a Party's designee shall be deemed to be, in rder of priority: i) the Party's attorney of record; ii) if the Party does not have an attorney of ecord, the Party itself at the address specified. 17. All real property owned by the Parties within the Basin is subject to this ludgment. The Judgment will be binding upon and inure to the benefit of each Party and their espective heirs, executors, administrators, trustees, successors, assigns, and agents. Any )arty, or executor of a deceased party, who transfers property that is subject to this judgment ;hall notify any transferee thereof of this judgment and shall ensure that the judgment is ecorded in the line of title of said property. This Judgment shall not bind the Parties that :ease to own property within the Basin, and cease to use groundwater. Within sixty days ollowing entry of this Judgment, the City of Santa Maria, in cooperation with the San Luis Ibispo entities and Golden State, shall record in the Office of the County Reporter in Santa 3arbara and San Luis Obispo Counties, a notice of entry of Judgment. The Clerk shall enter this Judgment. SO ORDERED, ADJUDGED, AND DECREED. >ate& January 25,2008 Juqge $the Superior Court :ase No. 1-97-CV-770214 udgment After Trial City of Arroyo Grande Appendix H. Water Conservation Ordinance 2015 Urban Water Management Plan - Final Draft H APPENDIX H. WATER CONSERVATION ORDINANCE Page 1 Chapter 13.05 ‐ WATER CONSERVATION[1] Sections: Footnotes: ‐‐‐ (1) ‐‐‐ Editor's note—Ord. No. 631, § 2, adopted May 10, 2011, repealed and replaced in its entirety the former Ch. 13.05, §§ 13.05.010—13.05.070, and enacted a new Ch. 13.05 as set out herein. The former Ch. 13.05 pertained to similar subject matter and derived from Ord. 576 §§ 2—4, 2005: Ord. 540 § 1, Exh. A (part), 2003. 13.05.010 ‐ Water conservation measures established. Mandatory water conservation measures are hereby established as set forth in this chapter. Please refer to Chapter 16.84, Water Efficient Landscape Requirements, for rules and regulations regarding landscape and irrigation, including limitations on the percentage of turf/lawn that can be placed in landscape areas. (Ord. No. 631, § 2, 5-10-2011; Ord. No. 633, § 3, 6-14-2011) 13.05.020 ‐ Application. A. To the extent authorized by law, this article shall apply to all customers and property within the city and the city's water service area. B. The provisions of this article do not apply to uses of water necessary to protect public health and safety or for essential health care or government services such as police, fire and other similar emergency services. C. The city council may adopt resolutions designed to implement the provisions of this chapter. (Ord. No. 631, § 2, 5-10-2011) 13.05.030 ‐ Water conservation requirements. The following water conservation requirements are effective at all times. Violations of this section shall be considered waste and an unreasonable use of water. Penalties for noncompliance are listed in Sections 13.05.050 and 13.05.060. A. Use of water which results in excessive gutter runoff is prohibited. B. Outdoor Water Use—Except Irrigation. 1. No water shall be used for cleaning driveways, patios, parking lots, sidewalks, streets or other such use except where necessary to protect the public health and safety; 2. Outdoor water use for washing vehicles shall be attended and have hand-controlled watering devices. C. Outdoor Irrigation. Page 2 1. Outdoor irrigation is prohibited between the hours of ten (10) a.m. and four p.m. 2. Irrigation of private and public landscaping, turf areas and gardens is permitted at even-numbered addresses only on Mondays and Thursdays and at odd-numbered addresses only on Tuesdays and Fridays. No irrigation of private and public landscaping, turf areas and gardens is permitted on Wednesdays. Irrigation is permitted at all addresses on Saturdays and Sundays however, in all cases customers are directed to use no more water than necessary to maintain landscaping. D. Emptying and refilling swimming pools and commercial spas is prohibited except to prevent structural damage and/or to provide for the public health and safety. New swimming pools may be constructed, however, they shall have a cover that conforms to the size and shape of the pool and act as an effective barrier to evaporation. The cover must be in place during periods when use of the pool is not reasonably expected to occur. E. Use of potable water for soil compaction or dust control purposes in construction activities is prohibited unless specifically approved by the city. F. Hotel, motel or other commercial lodging establishment shall offer their patrons the option to forego the daily laundering of towels, sheets and linens. G. Restaurants or other commercial food service establishments shall not serve water except upon the request of a patron. (Ord. No. 631, § 2, 5-10-2011; Ord. No. 669, § 2, 2-24-2015) 13.05.050 ‐ Penalties for noncompliance. A. Violation of any provision of this chapter may result in termination of water service until such violation is corrected, and until penalties are paid in full and will be subject to the following administrative procedure: 1. Written notice to the alleged offender, including the furnishing of informational material and advice where appropriate; 2. Recovery of all city staff costs, including overhead, or any second or greater offense within any one-year period; 3. Additional civil administrative penalties for any third or greater offense within any one-year period; 4. The right to appeal first to the utility billing adjustment committee and then to the city council. (Ord. No. 631, § 2, 5-10-2011) 13.05.060 ‐ Violation—Penalty. In addition to, and completely separate from, the civil enforcement provisions of the ordinance codified in this chapter, any person who knowingly and willfully violates the provisions of this chapter shall be guilty of a criminal misdemeanor as provided in the general penalty provisions of this code. All previous attempts by the city to obtain compliance by the defendant may be introduced as evidence of the offender's knowledge and willfulness. (Ord. No. 631, § 2, 5-10-2011) Page 1 13.07.020 ‐ Stage 1 or stage 2 water shortage emergencies defined. A. The provisions of this chapter relating to emergency water shortage restrictions and regulations are in addition to the water conservation requirements contained in Section 13.05.030 and shall take effect upon adoption of a resolution by the city council as further provided in Sections 13.07.030 and 13.07.040, based upon the recommendations of city staff and its analysis of the city's water supplies that stage 1 water shortage emergency or stage 2 water shortage emergency conditions exist, as defined in this section. Upon adoption, such resolutions shall remain in effect for the duration of the water shortage emergency conditions. 1. Stage 1 Water Shortage Emergency. A stage 1 water shortage emergency shall mean that there have been impacts to the city's water supply, and/or it has been determined that it is imminent that the city's water supply has or will become so limited that an emergency water shortage condition exists as far as the available water supply being less than projected demand. 2. Stage 2 Water Shortage Emergency. A stage 2 water shortage emergency shall mean that that it has been determined that the projected city's water supply is, or will become equal to or less than amounts that have been determined necessary to meet basic minimum household health and safety requirements, and restrictions and limits through the implementation of water allocations are necessary for continued water use that is reliable and sustainable by providing a minimum supply for the most essential purposes for human consumption, sanitation, and fire protection during the emergency situation. B. During a stage 1 or stage 2 water shortage emergency, if it is deemed in the city's interest in order to better monitor water usage, the billing period may be adjusted by city staff to provide for monthly billing, instead of bimonthly billing. C. Upon adoption of a resolution declaring a stage 1 or stage 2 water shortage emergency, the provisions of this chapter and any restrictions set forth in the resolution, shall apply to all persons using or consuming water provided by the city inside and outside of the city, regardless of whether any person using such water has a contract for water service with the city. D. If any other provision of the Arroyo Grande Municipal Code, whether enacted prior to or subsequent to the enactment of this chapter, is inconsistent with the provisions of this chapter, the provisions of this chapter shall supersede and control for the duration of the declared water shortage emergency set forth in the resolution of the city council. (Ord. No. 669, § 3, 2-24-2015) 13.07.030 ‐ Stage 1 water shortage emergency and historical use water restrictions. A. After holding a noticed public hearing in accordance with the requirements of Water Code Section 350 et seq., the city council may declare a stage 1 water shortage emergency based upon a determination that there has been impacts to the city's water supply, and/or it has been determined that it is imminent that the city's water supply has or will become so limited that an emergency water shortage condition exists as far as the available water supply being less than projected demand necessitating the institution of reductions in water usage based upon historical use, as further set forth in subsection B. B. Upon adoption of a stage 1 water shortage emergency resolution, all residential customers will be assigned a baseline amount of water, based upon the amount of water used during the same billing period of the previous year prior to the adoption of the resolution. All residential customers shall reduce water usage by a percentage amount set forth in the resolution, which percentages may be modified or amended by the city council as deemed necessary and appropriate. The percentage of required conservation shall increase depending on the billing tier of the residential customers water use as provided in the city's tiered water rate structure. The resolution shall include provisions for the imposition of mandatory financial penalties if the amount of water in each tier is exceeded, which Page 2 penalties may also be modified or amended by the city council as deemed necessary and appropriate based upon a determination of the severity of the water shortage emergency. The following shall be used as a general framework for the resolution establishing the baseline units for billing tiers and penalties, subject to such revisions deemed necessary in order to achieve the desired water savings: Residential customers in tier 1 shall be required to reduce consumption by the lowest percentage. Residential customers in tier 2 shall be required to reduce consumption by a larger percentage than those in tier 1. Residential customers in tier 3 shall be required to reduce consumption by an even larger percentage than those in tier 1 and tier 2. For example, tier 1 customers may initially be required to conserve five percent, tier 2 customers ten (10) percent and tier 3 fifteen (15) percent. As the emergency worsens, the city council, may by resolution, increase the percentage reduction deemed necessary in order to achieve the projected amount of water savings established as necessary. (Ord. No. 669, § 3, 2-24-2015) 13.07.040 ‐ Stage 2 water shortage emergency and household allocation water restrictions. A. After holding a noticed public hearing in accordance with the requirements of Water Code Section 350 et seq., the city council may declare a stage 2 water shortage emergency based upon a determination that the projected city's water supply is or will become equal to or less than amounts that have been determined necessary to meet basic minimum household health and safety requirements, and restrictions and limits through the implementation of water allocations are necessary for continued water use that is reliable and sustainable by providing a minimum supply for the most essential purposes for human consumption, sanitation, and fire protection during the emergency situation. B. Upon adoption of a stage 2 water shortage emergency, restrictions and limits shall be imposed through the implementation of household allocations of water units for residential customers. All residential customers will be allocated units of water deemed necessary for an average household size (one unit of water is equal to one hundred (100) cubic feet or seven hundred forty-eight (748) gallons). Any residential customer using over the assigned baseline unit amount shall be subject to a citation and the imposition of mandatory financial penalties, which shall be set forth in the resolution adopted by the city council and be based upon the severity of the water shortage emergency. Each household shall be allowed twelve (12) units of water per two month billing period (which is equivalent to one hundred fifty (150) gallons per household per day). Households with over five to seven people will be allowed twenty (20) units of water per two-month billing period (two hundred fifty (250) gallons per day). Households with over seven people will be allowed twenty-eight (28) units of water per two- month billing period (three hundred fifty (350) gallons per day). The allocations contained herein may be adjusted by the city council by resolution. (Ord. No. 669, § 3, 2-24-2015) 13.07.050 ‐ Commercial properties and irrigation meters. During a stage 1 water shortage emergency commercial water customers shall not be subject to mandatory penalties for use, provided however, that commercial customers with irrigation meter accounts shall reduce water use by such percentages specified in the resolution declaring the water shortage emergency. During a stage 2 water shortage emergency commercial water customers shall not use potable water for irrigation of outdoor landscaping. All commercial irrigation meters shall be shut off and billing will be suspended. The resolution shall also establish mandatory financial penalties for failing to meet required water use reductions. (Ord. No. 669, § 3, 2-24-2015) Page 3 13.07.060 ‐ Additional requirements and restrictions during stage 1 or stage 2 water shortage emergency. Upon adoption of a resolution declaring a stage 1 or stage 2 water shortage emergency the following shall apply: 1. Commercial, industrial or irrigation meter customers shall immediately follow any directive issued or declared by the city's water department to conduct water use audits, prepare water conservation plans and immediately repair any identified water system leaks, including leaks attributable to faulty pipes or fixtures. Commercial customers shall not violate any other water use restrictions intended to preclude excessive water usage, as adopted by the city. 2. Residential customers shall not violate any water use/allocation or other water rationing regulation implemented by resolution of the city council, including such regulations intended to preclude excessive water usage and specifying maximum water usage limitations, as otherwise provided by this chapter. (Ord. No. 669, § 3, 2-24-2015) 13.07.070 ‐ Adjustments in stage 1 reduction amounts, and other exceptions. A. During a stage 1 water shortage emergency the director, upon application made in writing by a customer on a form promulgated by the water department and accompanied by supporting documentation, shall be authorized to modify the percentage of water consumption reduction that is required by the customer, upon the customer's production of substantial evidence demonstrating the existence of unusual circumstances, including but not limited to the household having been vacant during a portion of the prior year billing period, resulting in the baseline water amount assigned to the household being lower than what would normally have been experienced. B. The percentage of reduction in water consumption during a stage 1 water shortage emergency, or the water allotments during a stage 2 water shortage emergency may also be adjusted if the existence of one or more of the following circumstances are shown and that are particular to that customer and which are not generally shared by other water department customers: 1. Failure to approve the requested exception would cause a condition having an adverse effect on the health, sanitation, fire protection, or safety of the customer. 2. Alternative restrictions to which the customer is willing to adhere are available that would achieve the same level of demand reduction as the restriction for which an exception is being sought and such alternative restrictions are enforceable by the water department. 3. Circumstances concerning the customer's property have changed since the implementation of the subject restriction warranting a change in the customer's water usage allocation or required percentage of reduction in consumption. C. In order to qualify for an exception, a customer must first complete a self-water audit pursuant to standards and procedures promulgated by the water department. This audit shall be made part of the customer's exception application and water conservation measures indicated by the audit may be incorporated as conditions of approval to an exception in addition to any other conditions of approval imposed by the director in connection with the director's approval of the customer's exception application. (Ord. No. 669, § 3, 2-24-2015) 13.07.080 ‐ Water shortage appeals board (WSAB). Page 4 A. Upon adoption of a resolution declaring a stage 1 or stage 2 water shortage emergency, the utility billing adjustment committee shall be empowered to act as the water shortage appeal board (WSAB). Thereafter, the water shortage appeal board will remain available to convene for as long as the water shortage emergency remains in effect. B. Any customer who considers an action taken by the director or an enforcement official under the provisions of this chapter, including action on adjustments to stage 1 water consumption reduction amounts, and on exception application, or the assessment of administrative penalties which have been erroneously taken or issued, may appeal that action or penalty to the water shortage appeals board in the following manner: 1. The appeal shall be made in writing, shall state the nature of the appeal specifying the action or penalty that is being appealed and the basis upon which the action or penalty is alleged to be in error. Penalty appeals shall include a copy of the bill or any applicable notice of violation; 2. An appeal, to be effective, must be received by the director not later than ten (10) business days following the date of the notice of violation or the date that the director took the action which is the subject of the appeal; 3. The director shall schedule the appeal for consideration by the WSAB. The WSAB shall hear the appeal within ninety (90) days of the date of the appeal and issue its decision within thirty (30) days of the date of the hearing; 4. In ruling on appeals, the WSAB shall strictly apply the provisions of this chapter, and shall not impose or grant terms and conditions not authorized by this chapter. 5. Decisions of the WSAB shall be subject to appeal to the city council in accordance with the procedures in Chapter 1.12 of this code, including the requirement that decisions be first taken up with the city manager. (Ord. No. 669, § 3, 2-24-2015) 13.07.090 ‐ Penalties and enforcement. A. Penalties. The purpose of the mandatory penalties assessed pursuant to this chapter and set forth in a resolution of the city council declaring a stage 1 or stage 2 water shortage emergency is to assure compliance by the customer through the imposition of increasingly significant penalties so as to create a meaningful incentive to reduce water use. In acknowledgment of the fact that the city's water is scarce and irreplaceable commodity and that this chapter is intended to equitably distribute that commodity among water department customers and to assure that, to the extent feasible, city water is conserved and used only for purposes deemed necessary for public health and safety, such mandatory penalties are not to be construed as creating a "water pricing" structure pursuant to which customers may elect to pay for additional water at significantly higher rates. B. A customer's repeated use of excessive water during a stage 1 or 2 water shortage emergency may result in criminal prosecution as a misdemeanor, and may result in the installation of a flow restriction device or disconnection of the customer's property from the city's water service system at the customer's cost, as further set forth herein. Flow restriction devices shall not be installed on residences that have fire sprinkler systems. C. Misdemeanor. In addition to, and completely separate from, the civil penalties for excessive water use, any person who knowingly and willfully violates the provisions of this chapter during a stage 1 or 2 water shortage emergency shall be guilty of a criminal misdemeanor as provided in the general penalty provisions of this code. In accordance with Section 1.16.010, such misdemeanor violations may, at the discretion of the city attorney, be initially charged or subsequently prosecuted as an infraction. All previous attempts by the city to obtain compliance by the defendant may be introduced as evidence of the offender's knowledge and willfulness. Page 5 D. Discontinuing Service. In addition to any penalties, misdemeanor criminal prosecution and the installation of a water flow restrictor, during a stage 1 or 2 water shortage emergency the director may disconnect a customer's water service for willful violations of mandatory restrictions and regulations in this chapter and Chapter 13.05. Upon disconnection of water service, a written notice shall be served upon the customer which shall state the time, place, and general description of the prohibited or restricted activity and the method by which reconnection can be made. E. Cost of Flow Restrictor and Disconnecting Service. A person or entity that as a result of violations of this chapter has a flow restrictor installed or water service disconnected is responsible for payment of charges for installing and/or removing the flow-restricting device and for disconnecting and/or reconnecting service in accordance with the city's fee schedule then in effect. The charge for installing and/or removing any flow restricting device must be paid before the device is removed. Nonpayment will be subject to the same remedies as nonpayment of basic water rates. (Ord. No. 669, § 3, 2-24-2015; Ord. No. 670, § 1, 5-26-2015)