Southern California Edison, the largest subsidiary of Edison International, is the primary electric utility company for much of Southern California. It provides 15 million people with electricity across a service territory of approximately 50,000 square miles. SCE owns all of its electrical transmission facilities and equipment. Deregulation of California's electricity market in the late 1990s forced the company to sell many of its power plants, though some were probably sold by choice. SCE retained its hydroelectric plants, totaling about 1,200 MW, and its 75% share of the 2,150-MW San Onofre Nuclear Generating Station. The plant is being decommissioned. In addition to its electric business, SCE operates the sole gas utility and water utility on Santa Catalina Island, under the names Catalina Island Gas Company and Catalina Island Water Company. Wikipedia