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2020 Urban Water Management Plan

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2020 Urban Water Management Plan CITY OF SAN DIEGO 2020 Urban Water Management Plan June 2021 Plan Preparation The 2020 San Diego UWMP was prepared on behalf of: City of San Diego Public Utilities Department 9192 Topaz Way, San Diego, MS9061 San Diego, CA 92123 Prepared by: CDM Smith 703 Palomar Airport Rd #300 Carlsbad, CA 92011 Table of Contents Section 1: Introduction and Plan Requirements ..................................................................9 1.1 Purpose of 2020 Urban Water Management Plan ................................................................. 9 1.2 Overview of the City Water and Wastewater Systems .......................................................... 11 1.3 Important Regulatory Changes Since the 2015 Urban Water Management Plan ............... 12 1.4 Related Water Policies and Plans ........................................................................................... 14 1.4.1 City’s Comprehensive Policy for a Sustainable Water Supply in San Diego ............... 14 1.4.2 City’s General Plan and City Community Plans ........................................................... 14 1.4.3 City’s Climate Action Plan and Resiliency Plan ............................................................. 15 1.4.4 City’s Water Shortage Contingency Plan ...................................................................... 15 1.4.5 San Diego County Water Authority 2020 UWMP ......................................................... 16 1.5 Plan Coordination ................................................................................................................... 16 1.6 Public Participation and Plan Adoption ................................................................................. 17 1.7 Plan Organization ................................................................................................................... 18 Section 2: Utility Service Area Description ..........................................................................19 2.1 Geography and Demographics .............................................................................................. 20 2.2 Climate and Resiliency ........................................................................................................... 21 2.3 Water Supply Sources and Utility Systems ............................................................................ 23 2.3.1 MWD System ................................................................................................................. 23 2.3.2 SDCWA System .............................................................................................................. 26 2.3.3 City’s Water System and Facilities ................................................................................ 29 2.4 Wastewater Treatment and Water Reclamation System ...................................................... 32 2.4.1 Point Loma Wastewater Treatment Plant .................................................................... 35 2.4.2 North City Water Reclamation Plant ............................................................................ 35 2.4.3 South Bay Water Reclamation Plant............................................................................. 35 2.4.4 Non-potable Recycled Water Facilities ......................................................................... 35 Section 3: Historical and Projected Water Use ...................................................................37 3.1 Historical Water Use by Sector .............................................................................................. 37 3.2 Historical Non-revenue Water and Non-potable Recycled Water ........................................ 39 3.3 Projected Potable Water Demands ....................................................................................... 40 3.3.1 Projected Low-income Residential Water Demands ................................................... 41 3.3.2 Projected Non-Revenue Water and Non-Potable Recycled Water.............................. 42 3.3.3 Total Water Demand Forecast ...................................................................................... 43 2020 San Diego Urban Water Management Plan | 3 Table of Contents Section 4: Water Supplies ........................................................................................................45 4.1 City Local Surface Water ........................................................................................................ 46 4.2 Local Groundwater Basins ..................................................................................................... 47 4.2.1 Historical Groundwater Basin Use ............................................................................... 48 4.2.2 Future Groundwater Use .............................................................................................. 48 4.3 Recycled Water(Non-potable Reuse) ..................................................................................... 48 4.3.1 Recycled Water System ................................................................................................ 49 4.3.2 Non-potable Recycled Water Use ................................................................................. 50 4.3.3 Future Non-potable Recycled Water Use ..................................................................... 51 4.3.4 Maximization of Recycled Water .................................................................................. 52 4.4 SDCWA Purchased Water ....................................................................................................... 54 4.4.1 MWD Water Supply Diversification Strategy ................................................................ 55 4.4.2 SDCWA Water Supply Diversification Strategy............................................................. 57 4.5 Summary of Water Supplies .................................................................................................. 60 Section 5: Demand Management Measures .......................................................................61 5.1 Baseline Daily Per Capita Water Use ..................................................................................... 61 5.2 Per Capita Water Use Targets ................................................................................................ 63 5.2.1 2020 Target Compliance ............................................................................................... 63 5.2.2 Water Conservation Targets Beyond 2020 .................................................................. 64 5.3 City’s Water Conservation Program ....................................................................................... 67 5.4 Drought Response .................................................................................................................. 67 5.4.1 Basic Public Education and Outreach Methods ........................................................... 67 5.4.2 Traditional and Specific Public Education and Outreach Methods ............................. 68 5.4.3 Unique Public Education and Outreach Methods ....................................................... 68 5.4.4 Metering ........................................................................................................................ 69 5.4.5 Volumetric Water Use Pricing ....................................................................................... 69 5.4.6 Distribution System Real Loss ...................................................................................... 69 5.4.7 Water Conservation Program Coordination ................................................................ 69 5.5 Planned Implementation to Achieve Water Use Targets ...................................................... 69 5.5.1 Residential Water Survey Programs ............................................................................. 69 5.5.2 Commercial Landscape Survey Programs ................................................................... 70 5.5.3 Water Conservation Rebate Program .......................................................................... 70 5.5.4 Water-Wise Business Survey ........................................................................................ 71 5.5.5 Water Waste Investigations .......................................................................................... 71 5.5.7 Get It Done App for iPhone® & Android® ..................................................................... 72 5.5.8 SoCal Water$mart Rebates ........................................................................................... 72 5.5.9 Current Customer Contests .......................................................................................... 72 5.5.10 General Plan Housing Element ................................................................................... 73 5.6 Sub-metering Ordinance ........................................................................................................ 74 5.7 Monitoring Future Water Conservation Savings ................................................................... 74 4 | 2020 San Diego Urban Water Management Plan Table of Contents Section 6: Water Supply Reliability Assessment ................................................................75 6.1 Normal Year Water Demand to Supply Comparison ............................................................ 76 6.2 Single Dry Year Water Demand to Supply Comparison ........................................................ 77 6.3 Multiple Dry
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