Item 21 - Public Hearing - Resolutions Approving the 2025 Urban Water Management Plan and the 2025 Water Shortage Contingency Plan

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2025 URBAN WATER MANAGEMENT PLAN MAY 2026/FINAL DRAFT/CAROLLO 6.2 Imported Water The City supplements its water supply with imported water purchased from MET. In FY 2024-25, the City relied on approximately 4,026 acre-feet per year (AFY)—approximately 13 percent of the City's water supply portfolio for FY 2024-25—of imported water from MET to meet its demands. MET's two principal sources of water are the Colorado River and the SWP. MET receives water from the Colorado River through the CRA and from the SWP through the California Aqueduct. For Orange County, the water obtained from these sources is treated at the Robert B. Diemer Filtration Plant located in the City of Yorba Linda. Typically,the Diemer Filtration Plant receives a blend of Colorado River water from Lake Mathews through the MET Lower Feeder and SWP water through the Yorba Linda Feeder. 6.2.1 Metropolitan Water District of Southern California MET is the largest water wholesaler in California, serving approximately 19 million customers in a 5,200-square-mile service area. MET wholesales imported water supplies to 26 member agencies located in the 6 southern California counties of Los Angeles, Orange, Riverside, San Bernardino, San Diego, and Ventura. MET is governed by a Board of Directors comprised of 38 appointed individuals with a minimum of one representative from each of MET's 26 member agencies.The allocation of directors and voting rights is determined by each agency's assessed valuation. Each member of the Board is entitled to cast one vote for each 10 million dollars of assessed valuation of property taxable for district purposes, in accordance with Section 55 of the Metropolitan Water District Act. Directors may be appointed by the chief executive officer of the member agency or by a majority vote from the agency's governing board. Directors are not compensated by MET for their service (The Metropolitan Water District Act, 1969). MET is responsible for importing water into the region through its operation of the CRA,which brings Colorado River supply to its service area, and its SWP contract,which brings water from northern California via the California Aqueduct. MET supplements its direct deliveries of imported supplies with its storage reservoirs,water transfers, agricultural irrigation water conservation, and water banking programs. Major imported water aqueducts bringing water to Southern California are shown in Figure 6.2. The Los Angeles Aqueduct, shown in the figure, is owned and operated by the Los Angeles Department of Water and Power, and not part of MET's imported water supplies. Member agencies receive water from MET through various delivery points and pay for service through a rate structure comprising volumetric rates, capacity charges, and readiness-to-serve charges. Member agencies provide MET with estimates of imported water demand in April each year, indicating the amount of water they anticipate they will need to meet their demands over the next five years. In Orange County, MWDOC and the cities of Anaheim, Fullerton, and Santa Ana are MET member agencies that purchase imported water directly from MET. Figure 6.3 illustrates the MET feeders and major transmission pipelines that deliver water within Orange County. CITY OF SANTA ANA