55C - WATER SUPPLY ASSESSMENT FOR MAINPLACE

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of Santa Ana Main Place Mall Transformation Project Water Supply Assessment previous 20 years; (2) the proposed supplier's urban water shortage contingency analysis; (3) reductions due to existing commitments of its supply; and (4) how much water the supplier can reasonably expect from other water supply projects, such as conjunctive use, recycled water programs, conservation, and water transfers from other areas. SB 221 is intended as a "fail safe" mechanism to ensure that collaboration on finding the needed water supplies to serve a new large subdivision occurs before construction begins. Cities and counties have an obligation to ensure that proposed developments (1) use water as efficiently as possible; (2) include reliable sources of sufficient water supply; and (3) accommodate growth in a sustainable fashion that minimizes conflicts with other demands on the State's source water resources. 3.2 Water Conservation Act of 2009 (SBx7-7) As an urban retail water supplier, the City is subject to the Water Conservation Act of 2009. The Act requires the State to reduce per -capita water consumption through a series of varying methodologies. The statute requires that urban water suppliers use one of the following four methods to determine their urban water use target: • Method 1: 80% of Base Daily Per Capita Water Use Value • Method 2: Performance Standards • Method 3: 95% of the Hydrologic Region 2020 Target Value • Method 4: Water Savings (developed by DWR) To meet this requirement, the City of Santa Ana has chosen Method 3: 95% of the Hydrologic Region 2020 Target Value as its compliance methodology. Under Compliance Option 3, to achieve 95 percent of the South Coast Hydrologic Region target as set forth in the State's 20x2020 Water Conservation Plan, the City's 2015 target is 123 gallons per capita per day (gpcd) and the 2020 target is 116 gpcd. The 2015 target is the midway value between the 10-year baseline and the confirmed 2020 target. In addition, the confirmed 2020 target must meet a minimum of five percent reduction from the five-year baseline water use. In this case, the confirmed 2020 target is the five percent reduction from the five-year baseline. The City's actual 2015 gpcd was 82, substantially lower than the 2015 and 2020 targets. In addition to its individual SBx7-7 requirements, the City is also a member of the Orange County 20x2020 Regional Alliance formed by MWDOC. This regional alliance is 29 retail agencies in Orange County as described in MWDOC's 2015 UWMP. MWDOC provides assistance in the calculation of each retail agency's baseline water use and water use targets. In 2015, the regional baseline and targets were revised to account for any revisions made by the retail agencies to their individual 2015 and 2020 targets. The regional water use target is the weighted average of the individual retail agencies' targets (by population). The Orange County 20x2020 Regional Alliance weighted 2015 target is 176 gpcd and 2020 target is 158 gpcd. The actual 2015 water use in the region is 125 gpcd, i.e. the region has already met its 2020 gpcd goal. Kimley»)Horn 55C-19 Page ) 11