Calif. Water Service Co.

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Founded in 1926, California Water Service Company (Cal Water) is one of the largest investor-owned American water utilities west of the Mississippi River and the third largest in the United States. It serves more than 460,000 customers through 28 customer and operations centers throughout the states. California Water Service Company (Cal Water) is one of the largest subsidiaries of the California Water Service Group, which also includes Washington Water Service Company, New Mexico Water Service Company, Hawaii Water Service Company and CWS Utility Services.