either i'm missing something or you failed to realize the entire state of california borders the pacific ocean...
the LADWP provided more than 2 billion US gallons (7.6 billion liters) of water in 2003, pumping it through 7,226 miles (11,629 km) of pipe. In fiscal year 2004-2005:
48% of the water came from the Sierra Nevada mountains via the Los Angeles Aqueduct;
41% came from the Metropolitan Water District of Southern California, which transports water from the California Aqueduct and Colorado River Aqueduct;
11% was from local groundwater, a resource that is actively managed and allocated, but is continually being threatened by chemical pollutants, such as MTBE and perchlorates;
1% came from recycled water, and was used for irrigation, recreation, and industrial purposes.