75E - PH - WATER MANAGEMENT PLAN

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2015 URBAN WATER MANAGEMENT PLAN retail water delivery can use up to a 15 -year average for the calculation. The City did not have recycled water use in 2008; therefore, a 10 -year baseline period is used. The City's baseline water use is 130 GPCD, obtained from the 10 -year period July 1, 1995 to June 30, 2005. 2.5.1.2 Five -Year Baseline Period (Target Confirmation) Water suppliers are required to calculate water use, in GPCD, for a five -year baseline period. This number is used to confirm that the selected 2020 target meets the minimum water use reduction requirements. Regardless of the compliance option adopted by the City, it will need to meet a minimum water use target of 5 percent reduction from the five -year baseline water use. This five -year baseline water use is calculated as a continuous five -year average during a period, which ends no earlier than December 31, 2007 and no later than December 31, 2010. The City's five -year baseline water use is 122 GPCD, obtained from the five -year period July 1, 2003 to June 30, 2008. 2.5.1.3 Service Area Population The City's service area boundaries correspond with the boundaries for a city or census designated place. This allows the City to use service area population estimates prepared by the Department of Finance (DOF). The CDR at California State University, Fullerton is the entity which compiles population data for Orange County based on DOF data. The calculation of the City's baseline water use and water use targets in the 2010 UWMP was based on the 2000 U.S. Census population numbers obtained from CDR. The baseline water use and water use targets in this 2015 UWMP have been revised based on the 2010 U.S. Census population obtained from CDR in 2012. 2.5.2 SBx7.7 Water Use Targets In the 2015 UWMP, the City may update its 2020 water use target by selecting a different target method than what was used in 2010. The target methods and determination of the 2015 and 2020 targets are described below. 2.5.2.1 SBx7 -7 Target Methods DWR has established four target calculation methods for urban retail water suppliers to choose from. The City is required to adopt one of the four options to comply with SBx7 -7 requirements. The four options include: f Option 1 requires a simple 20 percent reduction from the baseline by 2020 and 10 percent by 2015. • Option 2 employs a budget -based approach by requiring an agency to achieve a performance standard based on three metrics o Residential indoor water use of 55 GPCD o Landscape water use commensurate with the Model Landscape Ordinance 0 10 percent reduction in baseline commercial /industrial /institutional (CII) water use arced s.com 75E-32 2 -12