55B - RESO - CIVIC CENTER WATER SUPPLY

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CITY OF SANTA ANA CIVIC CENTER FACILITIES STRATEGIC PLAN WATER SUPPLY ASSESSMENT CITY OF SANTA ANA WATER FACILITIES City of Santa Ana is a public water system, Public Water Systern No. CA3010038, serving the City of Santa Ana. City of Santa Ana is a local water retailer with 44,610 municipal connections (2015) which supplied 36,656 acre -feet of water in 2015. The City receives its water from two main sources, local well water from the Lower Santa Ana River Groundwater Basin, also known as the Orange County Groundwater Basin (OC Basin), which is managed by Orange County Water District (OCWD), and imported water from Metropolitan Water District of Southern California (Metropolitan). The City is a member agency of Metropolitan. The City maintains 444 miles of transmission and distribution mains, nine reservoirs with a storage capacity of 44.3 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 or 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 — The City has two distinct pressure zones, the main zone and the high zone. 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. CITY OF SANTA ANA 2015 URBAN WATER MANAGEMENT PLAN City of Santa Ana 2015 Urban Water Management Plan (UWMP) provides a detailed summary of present and future water resources and demands and provides an assessment of the City's water resource needs. Specifically, the UWMP provides water supply planning for a 25 -year planning period in five -year increments and identifies water supplies needed to meet existing and future demands. The demand analysis identified supply reliability under three hydrologic conditions: a normal year, a single -dry year, and multiple -dry years. In addition, the 2015 UWMP details the City's SBx7 -7 target - setting process to achieve the 95 percent of the applicable state hydrologic region target as set forth in the State's 20x2020 Water Conservation Plan. The 2015 UWMP is an individual UWMP for a retail water agency, but the City is also a member of the Orange County 20x2020 Regional Alliance. 596IT31bb