2020 Urban Water Management Plan This plan was adopted on June ____, 2021 pursuant to San Luis Obispo City Council Resolution No. ________ (2021 series). San Luis Obispo City Council Heidi Harmon, Mayor Erica A. Stewart, Vice Mayor Carlyn Christianson Jan Marx Andy Pease Plan Prepared by: City of San Luis Obispo, Utilities Department 879 Morro Street San Luis Obispo, CA. 93401 The City’s 2020 Urban Water Management Plan is available for public review at the City’s web page at slowater.org For 2020, the City’s Water Shortage Continency Plan is published separately from the 2020 Urban Water Management Plan consistent with State requirements. The 2020 Water Shortage Continency Plan is also available for public review at the City’s web page at slowater.org 2020 Urban Water Management Plan Contents CHAPTER 1. Introduction 1.1 Urban Water Management Planning Act ...................................................................................... 1-1 1.2 Agency Coordination ..................................................................................................................... 1-2 1.3 Public Participation And Plan Adoption ......................................................................................... 1-3 1.4 Plan Implementation ..................................................................................................................... 1-3 1.5 Standarized Tables ....................................................................................................................... 1-3 1.6 Compliance Checklist .................................................................................................................... 1-3 1.7 Abbreviations & Acronyms ............................................................................................................ 1-4 1.8 Required UWMP Standardized Tables ......................................................................................... 1-5 CHAPTER 2. Service Area and Water System Description 2.1 Service Area Description............................................................................................................... 2-1 2.2 Service Area Popultion Projection and Other Demographic Information ...................................... 2-1 2.3 Water System Description ............................................................................................................ 2-3 2.4 Required UWMP Standardized Tables ....................................................................................... 2-12 CHAPTER 3. Current and Projected Water Demand 3.1 Water Use By Sector ..................................................................................................................... 3-1 3.2 Demand Sector Definitions ........................................................................................................... 3-2 3.3 Water Loss and Unbilled Authorized Consumption Types ........................................................... 3-2 3.4 Estimating Future Water Savings ................................................................................................. 3-3 3.5 Housing ......................................................................................................................................... 3-4 3.6 Baseline and Target For Water Use Reduction By 2020 .............................................................. 3-4 3.7 Updating Calculations from 2010 UWMP ..................................................................................... 3-4 3.8 Baseline Periods ........................................................................................................................... 3-5 3.9 Service Area Population................................................................................................................ 3-6 3.10 Gross Water Use ........................................................................................................................... 3-6 3.11 Baseline Per Capita Water Use .................................................................................................... 3-7 3.12 2015 and 2020 Targets ................................................................................................................. 3-7 3.13 Compliance Daily Per Capita Water Use ...................................................................................... 3-8 3.14 Influence of Climate Change on Water Demand 3-9 3.15 Required UWMP Standardized Tables ....................................................................................... 3-10 CHAPTER 4. Water Sources 4.1 Salinas Reservoir .......................................................................................................................... 4-1 4.2 Whale Rock Reservoir .................................................................................................................. 4-2 4.3 Nacimiento Reservoir .................................................................................................................... 4-4 4.4 Groundwater ................................................................................................................................. 4-5 4.5 Water Supply Summary ................................................................................................................ 4-7 4.6 Transfers And Exchanges ............................................................................................................. 4-7 4.7 Future Water Projects ................................................................................................................... 4-8 4.8 Desalinated Water Opportunities .................................................................................................. 4-8 4.9 Required UWMP Standardized Tables ......................................................................................... 4-9 CHAPTER 5. Recycled Water 5.1 Wastewater Collection, Treatment and Disposal .......................................................................... 5-1 5.2 Current Recycled Water Use ........................................................................................................ 5-2 5.3 Future System Expansion ............................................................................................................. 5-4 5.3 Recycled Water Program Incentives ............................................................................................. 5-5 5.5 Seasonal Surplus .......................................................................................................................... 5-6 5.6 Potable Reuse ............................................................................................................................... 5-7 5.7 Required UWMP Standardized Tables ......................................................................................... 5-8 i 2020 Urban Water Management Plan CHAPTER 6. Water Supply Reliability 6.1 Salinas and Whale Rock Reservoirs ............................................................................................. 6-1 6.2 Recycled Water ............................................................................................................................. 6-1 6.3 Nacimiento Reservoir .................................................................................................................... 6-2 6.4 Groundwater ................................................................................................................................. 6-2 6.5 Water Quality ................................................................................................................................ 6-3 6.6 Water Supply Reliability Analysis .................................................................................................. 6-3 6.7 Required UWMP Standardized Tables ......................................................................................... 6-5 CHAPTER 7. Water Conservation & Demand Management Measures 7.1 History ........................................................................................................................................... 7-1 7.2 Conservation Program Highlights (2016 to 2020) ......................................................................... 7-1 7.3 State and Local Emergency Drought Declaration ......................................................................... 7-2 7.4 Water Waste Prevention Ordinances ............................................................................................ 7-3 7.5 Water Metering .............................................................................................................................. 7-3 7.6 Water Rate Structure and Cost of Service .................................................................................... 7-4 7.7 Public Education and Outreach .................................................................................................... 7-4 7.8 Programs to Assess and Manage Distribution System Real Loss ............................................... 7-5 7.9 Water Conservation Program Coordination and Staffing Support ................................................ 7-6 7.10 Other Demand Management Measures ........................................................................................ 7-6 For 2020, the City’s Water Shortage Continency Plan is published separately from the 2020 Urban Water Management Plan consistent with State requirements. ii 2020 Urban Water Management Plan List of Tables TABLE 1: San Luis