California Water Service Group is a holding company. The Company through its wholly owned subsidiaries provides water utility and other related services in California, Washington, New Mexico and Hawaii. It operates through six operating subsidiaries: California Water Service Company (Cal Water), New Mexico Water Service Company (New Mexico Water), Washington Water Service Company (Washington Water), Hawaii Water Service Company, Inc. (Hawaii Water), and CWS Utility Services and HWS Utility Services LLC (collectively, Utility Services). Utility Services provides non-regulated services to private companies and municipalities. Its business consists of the production, purchase, storage, treatment, testing, distribution and sale of water for domestic, industrial, public and irrigation uses, and for fire protection. Its non-regulated services include full water system operation, billing and meter reading services.