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2015 URBAN WATER MANAGEMENT PLAN <br />2013 -14) and represent a normal weather, normal economy, and non - drought condition. The <br />demographic factors are future demographic projections, including the number of housing units for single <br />and multi - family residential sectors and the total employment (number of employees) for the non- <br />residential sector, as provided by CDR. <br />The OC Reliability Study accounted for drought impacts on 2016 demands by applying the assumption <br />that water demands will bounce back to 85 percent of 2014 levels (i.e. pre- drought levels) by 2020 and 90 <br />percent by 2025 without future conservation, and continue at 90 percent of unit water use through 2040. <br />The unit water use factor multiplied by a demographic factor yields demand projections without new <br />conservation. To account for new implementation of conservation, projected savings from new passive <br />and active conservation as a result of plumbing codes, water model efficiency landscape ordinance, and <br />rebates from Metropolitan were excluded from these demands. <br />As described above, the OC Reliability Study provided demand projections for three regions within <br />Orange County: Brea /La Habra, OC Basin, and South County. The City's water demand represents a <br />portion of the OC Basin region total demand. The City's portion was estimated as the percentage of the <br />City's five -year (FY 2010 -11 to FY 2014 -15) average usage compared to the OC Basin region total <br />demand for the same period. <br />2.4.2 Agency Refinement <br />Demand projections were developed by MWDOC for the City as part of the OC Reliability Study. The <br />future demand projections were reviewed and accepted by the City as a basis for the 2015 UWMP. <br />2.4.3 25 Year Projections <br />A key component of the 2015 UWMP is to provide insight into the City's future water demand outlook. <br />The City's current total water demand is 36,655 AFY, met through locally pumped groundwater and <br />purchased imported water from Metropolitan. Table 2 -4 is a projection of the City's water demand for the <br />next 25 years. <br />Table 2 -4: Demands for Potable and Raw Water - Projected (AF) <br />A" <br />arcadis.com 66 i2fi 2 -7 <br />7Aditional Description <br />Projected <br />20M <br />2025 <br />2030 <br />2035 1, <br />2040 <br />Single Family <br />14,093 <br />15,138 <br />15,242 <br />15,238 <br />15,260 <br />Multi-Family <br />10,406 <br />11,177 <br />11,254 <br />11,251 <br />11,267 <br />Other <br />(CII) <br />Comm /Instit /Indust <br />12,033 <br />12,925 <br />13,014 <br />13,010 <br />13,029 <br />Landscape <br />Large <br />147 <br />158 <br />159 <br />159 <br />159 <br />TOTAL <br />36,678 <br />39,397 <br />39,669 <br />39,658 <br />39,716 <br />NOTES: Data retrieved from MWDOC Customer Class Usage Data and FY 2014 -2015 Retail Tracking. <br />arcadis.com 66 i2fi 2 -7 <br />