2020 Urban Water Management Plan Livermore District June 2021 Quality. Service. Value 2020 Urban Water Management Plan California Water Service Livermore District Table of Contents Table of Contents ............................................................................................................................ 1 List of Tables ................................................................................................................................... 5 List of Figures .................................................................................................................................. 7 List of Acronyms .............................................................................................................................. 8 Chapter 1 Introduction and Overview .......................................................................................... 10 1.1 Background and Purpose ............................................................................................... 10 1.2 Urban Water Management Planning and the California Water Code ........................... 11 1.3 Relationship to Other Planning Efforts .......................................................................... 12 1.4 Plan Organization ........................................................................................................... 12 1.5 Demonstration of Consistency with the Delta Plan for Participants in Covered Actions .. ........................................................................................................................................ 13 1.6 Lay Description ............................................................................................................... 14 Chapter 2 Plan Preparation ........................................................................................................... 18 2.1 Public Water Systems ..................................................................................................... 18 2.2 Regional Planning ........................................................................................................... 19 2.3 Individual or Regional Planning and Compliance (Regional Alliance) ............................ 19 2.4 Plan Preparation, Standard Units, and Basis for Reporting ........................................... 20 2.5 Coordination and Outreach ........................................................................................... 21 2.5.1 Wholesale and Retail Coordination ........................................................................ 22 2.5.2 Coordination with and Notice to Other Agencies and the Community ................. 23 2.5.3 Coordination with Land Use Authorities ................................................................ 23 Chapter 3 System Description ...................................................................................................... 24 3.1 General Description........................................................................................................ 24 3.2 Service Area Boundary Map ........................................................................................... 25 3.3 Service Area Climate ...................................................................................................... 26 3.4 Service Area Population and Demographics .................................................................. 27 3.5 Land Uses within Service Area ....................................................................................... 29 Chapter 4 Water Use Characterization ......................................................................................... 31 4.1 Non-Potable Versus Potable Water Use ........................................................................ 31 EKI Environment & Water, Inc. June 2021 Page 1 M.Cubed Printed 6/24/2021 Gary Fiske and Associates 2020 Urban Water Management Plan California Water Service Livermore District 4.2 Past, Current, and Projected Water Uses by Sector ...................................................... 32 4.2.1 Past and Current Water Use ................................................................................... 32 4.2.2 Projected Water Use ............................................................................................... 33 4.2.3 Distribution System Water Loss .............................................................................. 35 4.2.4 Future Water Savings in Projected Water Use ....................................................... 36 4.2.5 Water Use by Lower Income Households in Water Use Projections ..................... 39 4.2.6 Characteristic Five-Year Water Use ........................................................................ 40 4.3 Climate Change Considerations ..................................................................................... 40 Chapter 5 SB X7-7 Baseline and Targets ....................................................................................... 42 5.1 Wholesale Suppliers ....................................................................................................... 43 5.2 Updates to the 2015 UWMP Calculations...................................................................... 43 5.3 Service Area Population ................................................................................................. 43 5.4 Baseline Periods, Baseline GPCD, and Confirmed SB X7-7 2020 Target ........................ 43 5.5 Demonstration of Compliance with SB X7-7 2020 Target ............................................. 44 5.6 Demonstration of Compliance with Regional Alliance SB X7-7 2020 Target ................. 44 Chapter 6 Water Supply Characterization .................................................................................... 46 6.1 Purchased Water ............................................................................................................ 47 6.2 Groundwater .................................................................................................................. 48 6.2.1 Basin Description and Status .................................................................................. 49 6.2.2 Non-SGMA Groundwater Management ................................................................. 51 6.2.3 SGMA Groundwater Management ......................................................................... 52 6.2.4 Cal Water Coordination with Groundwater Sustainability Agencies ..................... 53 6.2.5 Historical Pumping and Supply Sufficiency ............................................................. 54 6.3 Surface Water ................................................................................................................. 55 6.4 Stormwater .................................................................................................................... 55 6.5 Wastewater and Recycled Water ................................................................................... 56 6.5.1 Recycled Water Coordination ................................................................................. 56 6.5.2 Wastewater Collection, Treatment, and Disposal .................................................. 56 6.5.3 Recycled Water System and Recycled Water Beneficial Uses ................................ 60 6.5.4 Actions to Encourage and Optimize Future Recycled Water Use .......................... 62 6.6 Desalinated Water Opportunities .................................................................................. 63 EKI Environment & Water, Inc. June 2021 Page 2 M.Cubed Printed 6/24/2021 Gary Fiske and Associates 2020 Urban Water Management Plan California Water Service Livermore District 6.7 Water Exchanges and Transfers ..................................................................................... 63 6.7.1 Exchanges ................................................................................................................ 63 6.7.2 Transfers ................................................................................................................. 63 6.7.3 Emergency Interties ................................................................................................ 64 6.8 Future Water Projects .................................................................................................... 64 6.9 Summary of Existing and Planned Sources of Water ..................................................... 65 6.10 Special Conditions....................................................................................................... 68 6.10.1 Climate Change Effects ........................................................................................... 68 6.10.2 Regulatory Conditions and Project Development .................................................. 68 6.10.3 Other Locally Applicable Criteria ............................................................................ 70 6.11 Energy Intensity .......................................................................................................... 71 Chapter 7 Water Supply Reliability Assessment ........................................................................... 73 7.1 Constraints on Water Sources........................................................................................ 73 7.1.1 Supply Availability ................................................................................................... 74 7.1.2 Water Quality .........................................................................................................