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2025 URBAN WATER MANAGEMENT PLAN <br /> MAY 2026/FINAL DRAFT/CAROLLO <br /> between OCWD and the Orange County Sanitation District (OC San). Using advanced treatment, recycled <br /> wastewater is transformed into a high-quality water supply for groundwater replenishment. <br /> The City's main source of water supply is groundwater from the OC Basin. Imported water makes up the <br /> rest of the City's water supply portfolio. In Fiscal Year(FY) 2024-25, the City relied on approximately <br /> 87 percent groundwater and 13 percent imported water(Table 6.1). <br /> Table 6.1 Water Supplies-2025 Actual <br /> Submittal Table 6-8 Retail:Water Supplies—2025 Actual <br /> Water Code Section 0. <br /> Water Supply <br /> Additional Water Type Actual Volume <br /> Description (after treatment if <br /> treated) (AF) <br /> Purchased or MWD Potable 4,026 <br /> Imported Water <br /> Groundwater Orange County Potable 28,615 <br /> (not desalinated) Groundwater Basin <br /> Recycled Water OCWD Non-Potable 294 <br /> Subtotal Potable 32,641 <br /> Subtotal Non-Potable 294 <br /> Total 32,935 <br /> NOTES: Source-MWDOC,2025 <br /> AF-acre-feet <br /> In 2025,the Municipal Water District of Orange County(MWDOC) developed a water demand forecast <br /> model for its participating water agencies that statistically correlates municipal and industrial (M&I) water <br /> use with demographic, socioeconomic, conservation, and weather variables—as reported in the 2025 <br /> Orange County Water Demand Projection Model Technical Memorandum (TM) (MWDOC, 2025). Because <br /> the model isolates weather, future water demand projects can be estimated under single- and multiple <br /> year-droughts and under future climate change scenarios. <br /> It is projected that by 2050, the City's water portfolio will continue to be approximately 85 percent <br /> groundwater and 15 percent imported water(Figure 6.1 and Table 6.2). It should be noted that these <br /> representations of supply match the projected demand. However,the City can purchase more MET <br /> imported water, should the need arise. Note that the GWRS supplies are included as part of groundwater <br /> pumping numbers. <br /> The following subsections provide a detailed discussion of the City's water sources as well as the future <br /> water supply portfolio for the next 25 years. <br /> CITY OF SANTA ANA <br />