75E - PH - WATER MANAGEMENT PLAN

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2015 URBAN WATER MANAGEMENT PLAN state's water reduction goal. The City may choose to comply with SBx7 -7 individually or as a region in collaboration with other retail water suppliers. Under the regional compliance option, the City is still required to report its individual water use targets. The City is required to be in compliance with SBx7 -7 either individually or as part of the alliance, or demonstrate they have a plan or have secured funding to be in compliance, in order to be eligible for water related state grants and loans on and after July 16, 2016. For the 2015 UWMP, the City must demonstrate compliance with its 2015 water use target to indicate whether or not they are on track to meeting the 2020 water use target. The City also revised their baseline per capita water use calculations using 2010 U.S. Census data. Changes in the baseline calculations also result in updated per capita water use targets. DWR also requires the submittal of SBx7 -7 Verification Forms, a set of standardized tables to demonstrate compliance with the Water Conservation Act in this 2015 UWMP. This form is included as Appendix B. 2.5.1 Baseline Water Use The baseline water use is the City's gross water use divided'' by its service area population, reported in gallons per capita per day (GPCD). Gross water use is a measure of water that enters the distribution system of the supplier over a 12 -month period with certain allowable exclusions. These exclusions are: • Recycled water delivered within the service area • Indirect recycled water • Water placed in long term storage • Water conveyed to another urban supplier • Water delivered for agricultural use • Process water Water suppliers within the OC Basin, including the City, have the option of choosing to deduct recycled water used for indirect potable reuse from their gross water use to account for the recharge of recycled water into the OC Basin by OCWD, historically through Water Factory 21, and now by the Groundwater Replenishment System (GWRS). Water suppliers must report baseline water use for two baseline periods, the 10- to 15 -year baseline (baseline GPCD) and the five -year baseline (target confirmation) as described below. 2.5.1.1 Ten to 15 -Year Baseline Period (Baseline GPCD) The first step to calculating the City's water use targets is to determine its base daily per capita water use (baseline water use). This baseline water use is essentially the City's gross water use divided by its service area population, reported in GPCD. The baseline water use is calculated as a continuous (rolling) 10 -year average during a period, which ends no earlier than December 31, 2004 and no later than December 31, 2010. Water suppliers whose recycled water made up 10 percent or more of their 2008 75E -31 arcadis.com 2 -11