Water Supply Conditions

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Water Supplies and Sources

Click on the images below to get a closer look at the State's complex water supply system, including the Colorado River Aqueduct (CRA), on the left, and our second major supply, the State Water Project (SWP), on the right.   

 CA Waterways Map_worksheet_tabloid-4    delta_factssheets_Page_1


The Metropolitan Water District of Southern California

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Metropolitan imports water supplies to Southern California from two main sources: the Sacramento and San Joaquin Rivers through the State Water Project and the Colorado River via the Colorado River Aqueduct . Both river systems provide vital baseline supplies for the region and are the foundation of Metropolitan's multifaceted water resource portfolio. Metropolitan invests significant resources in both systems – expanding, repairing and upgrading facilities to ensure the region's water supplies are reliable.

State Water Project                                                       Colorado River Aqueduct



Municipal Water District of Orange County


The Municipal Water District of Orange County (MWDOC) is a wholesale water supplier and resource planning agency. Their efforts focus on sound planning and appropriate investments in water supply development, water use efficiency, public information, legislative advocacy, water education, and emergency preparedness. MWDOC’s service area covers all of Orange County, with the exception of the cities of Anaheim, Fullerton, and Santa Ana. They serve Orange County through 28 retail water agencies, including the City of San Clemente.

Local water supplies meet nearly half of Orange County’s total water demand. To meet the remaining demand, MWDOC purchases imported water – from northern California and the Colorado River – through the Metropolitan Water District of Southern California. MWDOC delivers this water to its 28 client agencies, including San Clemente, which provide retail water services to the public.


City of San Clemente


The City of San Clemente water system consists of 13 service zones defined by reservoirs and 20 sub-zones through pressure reducing stations. The City maintains approximately 206 miles of distribution system piping, 16 pumping stations, 56 pressure reducing stations, one filtration plant, 14 local and two regional reservoirs, and two groundwater wells (Wells No.6 and No.8).

Most of the City’s water supply is imported through two systems originating at Metropolitan. One of these is the Local Transmission Main (LTM) System; the second is the Water Importation Pipeline (WIP) System. The City has 14.78 cubic feet per second (cfs) capacity through the LTM, and 15 cfs ultimate capacity through the WIP. The WIP capacity is limited to 6.7 cfs until 2016, or until the City purchases additional capacity in the Allen McColloch Pipeline (AMP).






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