Item 27 - Water Supply Assessment for Cabrillo Town Center Project

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Santa Ana 2020 Urban Water Management Plan arcadis.com ES-2 WATER USE CHARACTERIZATION Water use within the City’s service area has been relatively stable in the past decade with an annual average of 36,245 AF. Potable and non-potable water use accounts for an average of 99% and 1% of total City water use, respectively. In fiscal year (FY) 2019/20, the City’s water use was 33,240 AF of potable water (groundwater and imported) and 249 AF of direct recycled water for landscape irrigation. In FY 2019-20, the City’s potable water use profile comprised of 65.5% residential use, 24.5% commercial, industrial, and institutional (CII), and 4.0% large landscape/irrigation. Non-revenue water and other uses account for 5.9% of City’s water demand. Water Use Projections: 5-year and 25-year The City’s service area is almost completely built-out and is projected to add minimum land use and small population increase. Water demand is likely to increase by 1.2% over the next 5 years. In the longer term, water demand is projected to be stable from 2025 through 2045 (a slight decrease of 0.2% over the 20-year period). The projected potable and non-potable water use for 2045 is 33,578 AF and 249 AF, respectively. This demand projection considers such factors as current and future demographics, future water use efficiency measures, and long-term weather variability. CONSERVATION TARGET COMPLIANCE Retail water suppliers are required to comply with the requirements of Water Conservation Act of 2009, also known as SBx7-7 (Senate Bill 7 as part of the Seventh Extraordinary Session), which was signed into law in 2010 and requires the State of California to reduce urban water use by 20% by 2020 from a 2013 baseline. The retail water suppliers can comply individually or as a region in collaboration with other retail water suppliers, in order to be eligible for water related state grants and loans. The City is part of the Orange County 20x2020 Regional Alliance created in collaboration with MWDOC, its retail member agencies as well as the Cities of Anaheim and Fullerton. The Alliance was created to assist OC retail agencies in complying with SBx7-7. The City met its 2020 water use target and is in compliance with SBx7-7; the actual 2020 consumption was 66 gallons per capita per day (GPCD), which is below its 2020 target of 116 GPCD. WATER SUPPLY CHARACTERIZATION The City meets all of its demands with a combination of local groundwater, imported water, and recycled water. The City works together with two primary agencies, MET and OCWD, to ensure a safe and reliable water supply that will continue to serve the community in periods of drought and shortage. The sources of imported water supplies include water from the Colorado River and the State Water Project (SWP) provided by MET. The City’s main source of water supply is groundwater from the OC Basin. Imported water and recycled water supplement the City’s water supply portfolio. In FY 2019-20, the City’s water supplies consisted of 76% groundwater, 23% imported water, and 1% recycled water. It is projected that by 2045, the City’s water supply portfolio will shift to 84% groundwater, 15% imported water, and 1% recycled water. Note that these representations of supply match the projected demand.