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2025 URBAN WATER MANAGEMENT PLAN <br /> MAY 2026/FINAL DRAFT/CAROLLO <br /> Efficient Landscape Ordinances (MWELO) mandated since 1993. Seasonal price elasticity varies the <br /> least between months for the multi-family sector. <br /> ■ Commercial, Industrial, and Institutional use is positively correlated to each job proportion as well as <br /> gross domestic product throughout Orange County, which means a higher amount of CII jobs and <br /> production value trend in an increase in water demands. <br /> ■ Irrigation is the most responsive to temperature and precipitation compared to the other sectors. <br /> } <br /> 700.000 <br /> LL <br /> Q <br /> C 650.000 <br /> E <br /> Q1 <br /> 7 600.000 <br /> C <br /> C _ <br /> Q <br /> T <br /> = 550.000 <br /> 0 <br /> U <br /> c. 500.000 -------------- ---------------------- <br /> o ...._:------------------------------- <br /> m <br /> 0 450.000 <br /> O N Q (D C2 O N Q (0 00 O N Q (D 00 O (N Q (0 00 O <br /> N N (N (V N C') co Cl) Cl) M Q Q Q Q In <br /> O O O O O O O O O O O O O O O O O O O O O <br /> N N N N N N N N N N N N N N N N N N N N N <br /> Historical ----Baseline Normal Year Single Hot/Dry Year <br /> —2nd Hot/Dry Year 3rd Hot/Dry Year 4th Hot/Dry Year <br /> 5th Hot/Dry Year ----High Demand Scenario --- Low Demand Scenario <br /> Figure 4.2 Projected Water Use Across All Orange County Water Agencies <br /> In terms of future development, north Orange County is substantially built out,with a majority of <br /> residential land uses with some mixed-use areas dedicated to commercial, institutional, and governmental <br /> uses. Future developments planned in north Orange County are mainly redevelopment and infill projects. <br /> As for the City's service area specifically, future developments will primarily be redevelopment, multiuse <br /> projects, in the 'focus areas' listed in the City's General Plan, housing to meet the City's Regional Housing <br /> Needs Assessment (RHNA) allocation, and accessory dwelling units (ADU), which will all shape the City's <br /> future water use trends. <br /> Water use within the City's service area has fluctuated in the past five years (Fiscal Year [FY] 2020-21 <br /> through FY 2024-25),with an annual average total water use of approximately 32,420 acre-feet per year <br /> (AFY). Following one of the worst droughts in California history between 2017 and 2022, the significant <br /> wet year in 2023 saw a decrease in overall water use from FY 2021-22 to FY 2022-23 in the City's entire <br /> service area. <br /> Water use in FY 2024-25 included 32,641 acre-feet (AF) of potable water and 294 AF of non-potable water <br /> for landscape irrigation. The City's water use is primarily residential.The projected water use in 2050 is <br /> 31,920 AF for potable water and 247 AF for non-potable water. <br /> CITY OF SANTA ANA <br />