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Section 2 <br />2.1 Purpose <br />The purpose of the Mid Basin Centennial Park Injection Well Project is to <br />replenish the Orange County Groundwater Basin with advanced treated recycled <br />water from the Orange County Water District Groundwater Replenishment <br />System (GWR System), <br />2.2 Need <br />The Orange County Water District (OCWD) is the manager of the Orange <br />County Groundwater Basin, The Orange County Groundwater Basin provides <br />underground water Supplies to 23 cities and over 2.3 million persons in <br />Orange County, California. Within OCWD service boundaries over 65 <br />percent of the domestic water needs is provided by groundwater- The <br />remaining water is provided from imported water supplies from northern <br />California and from the Colorado River, <br />Due to the extremely dry conditions, the Orange County Groundwater Basin <br />has experienced substantial overdraft increases as high as up to 320,000 <br />acre-feet. The maximum overdraft of the basin is 500,000 acre-feet. Without <br />additional local Supplies, the Orange County Groundwater Basin would <br />approach maximum overdraft, requiring reductions in groundwater <br />withdrawals and placing additional strain on an already ,over used imported <br />water system. Additionally, because of prolonged drought conditions in <br />California, imported water supplies from the State Water Project are at an all-time <br />low to help replenish the Orange County Groundwater Basin. As a result OCWD <br />must maximize local water supplies to help replenish the groundwater basin. To <br />replenish the Orange County Groundwater Basin with local water supplies, <br />Orange County Water District is proposing to use advanced recycled water from <br />its Groundwater Replenishment System (GWR System) as the local water source <br />for its proposed Mid Basin Centennial Park Injection Well Project. The GWR <br />System is a joint water reclamation project with OCWD and the Orange County <br />Sanitation District that takes secondary treated wastewater and through <br />advancement treatment treats the water to exceed drinking water standards. The <br />Mid Basin Centennial Park Injection Well Project proposes the construction of <br />four injection wells that would inject up to 12 MGD of GWRS water into the <br />groundwater basin. By utilizing the GWRS as a local water source for the Mid <br />Basin Centennial Park Injection Well Project, OCWD would' have to rely as <br />heavily on imported supplies to help to replenish the Orange County <br />Groundwater Basin. <br />ur Mid Basin Centennial Park I(JL'5EUt' =11 Project Final EIR 2-1 <br />26N <br />