55A - RESO WATER SUPPLY ASSESSMENT

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2015 URBAN WATER MANAGEMENT PLAN 1.3.2 City of Santa Ana Water Facilities The City maintains 444 miles of transmission and distribution mains, nine reservoirs with a storage capacity of 49.3 million gallons, seven pumping stations, 20 wells, and seven import water connections. Thirteen of the City wells pump into surface reservoirs with booster stations pumping the water into the distribution system. The remaining wells pump directly into the City's distribution system. Water pumped from these wells has been naturally filtered as it passes through underlying aquifers of sand, gravel, and soil. This well water only requires disinfectant treatment for system distribution. The City maintains seven imported water connections to receive water through Metropolitan's Orange County and East Orange County Feeder pipelines. Seven metered connections with a total capacity of 60,580 gallons per minute (gpm) transfer water into the City's distribution system. System Pressures — Reducing distribution system pressures will, to a certain degree, conserve water and pumping energy by reducing leaking in water and plumbing systems, as well as reducing waste or water when turning water fixtures on and off. The City continually reviews the pressure zones to determine the feasibility of reducing system pressures by lowering settings on distribution system pressure regulators. The reviews have indicated that potential fire protection requirement deficiencies occur when pressures are reduced. Therefore, the City maintains safe yet efficient system pressures. Peak Demand— Water system demand patterns are a result of climatological, land use, sociological, and institutional factors, all of which affect the amount of water consumed. Reduction in peak demands can reduce the need for construction of new water storage and conveyance facilities and, in certain instances, the development of new water sources. The City's computerized telemetry system allows water system operators to operate the system more efficiently through the ability to stage and prioritize water production facilities usage to meet these ever changing demand patterns. The system connections and total water volume supplied including non -potable are summarized in Table 1-3, and the wholesalers informed of this water use as required are displayed in Table 1-4. Table 1-3: Public Water Systems Public Water System Public Water System Number of Municipal Volume of Number Name Connections2b15 Water Supplied 2015 CA3010038 City of Santa Ana 44,610 37,007 TOTAL 44,610 37,007 NOTES: amadis.com 66vii b 1-7