California Water Service Group is a holding company. The Company operates 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 are collectively called Utility Services. Cal Water, New Mexico Water, Washington Water, and Hawaii Water are regulated public utilities. Utility Services provides non-regulated services to private companies and municipalities. The Company's business is conducted through its operating subsidiaries. Its bulk 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. It also provides non-regulated water-related services under agreements with municipalities and other private companies.