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Santa Ana 2020 Urban Water Management Plan <br />arcadis.com <br />3-6 <br />Fourteen of the City Wells pump into surface reservoirs with booster stations pumping the water into the <br />distribution system. The remaining seven wells pump directly into the City’s distribution system. Water <br />pumped from all of the wells has been naturally filtered as it passes through underlying aquifers of sand, <br />gravel, and soil. This well water only requires disinfectant treatment for system distribution. <br />The City maintains seven imported water connections to receive water through MET’s Orange County <br />and East Orange County Feeder pipelines. These seven metered connections with a total capacity of <br />60,580 gallons per minute (gpm) transfer water into the City’s distribution system. <br />System Pressures – Reducing distribution system pressures will, to a certain degree, conserve water <br />and pumping energy by reducing leaking in water and plumbing systems, as well as reducing waste or <br />water when turning water fixtures on and off. The City continually reviews the pressure zones to <br />determine the feasibility of reducing system pressures by lowering settings on distribution system <br />pressure regulators. The reviews have indicated that potential fire protection requirement deficiencies <br />occur when pressures are reduced. Therefore, the City maintains safe yet efficient system pressures. <br />Peak Demand – Water system demand patterns are a result of climatological, land use, sociological, and <br />institutional factors, all of which affect the amount of water consumed. Reduction in peak demands can <br />reduce the need for construction of new water storage and conveyance facilities and, in certain instances, <br />the development of new water sources. The City’s computerized telemetry system allows water system <br />operators to operate the system more efficiently through the ability to stage and prioritize water <br />production facilities usage to meet these ever-changing demand patterns. <br />The system connections and water volume supplied are summarized in Table 3-1. <br />Table 3-1: Retail Only: Public Water Systems <br />DWR Submittal Table 2-1 Retail Only: Public Water Systems <br />Public Water System <br />Number <br />Public Water System <br />Name <br />Number of Municipal <br />Connections 2020 <br />Volume of <br />Water Supplied <br />2020 <br />CA3010038 City of Santa Ana 45,037 33,489 <br />TOTAL 45,037 33,489 <br />NOTES: <br />Climate <br />The City is located within the SCAB that encompasses all of OC, and the urban areas of Los Angeles, <br />San Bernardino, and Riverside counties. The SCAB climate is characterized by Southern California’s <br />“Mediterranean” climate: a semi-arid environment with mild winters, warm summers, and moderate <br />rainfall. <br />Local rainfall has limited impacts on reducing water demand in the City, except for landscape irrigation <br />demand. Water that infiltrates into the soil may enter groundwater supplies depending on the local <br />geography. However, due to the large extent of impervious cover in Southern California, rainfall runoff