California Water Service Group is a holding company, which engages in the provision of water utility and other related services in California, Washington, New Mexico, and Hawaii through its wholly owned subsidiaries. The firm is involved in the production, purchase, storage, treatment, testing, distribution and sale of water for domestic, industrial, public, and irrigation uses, and fire protection. It also provides non-regulated water-related services under agreements with municipalities and other private companies. The company was founded in 1926 and is headquartered in San Jose, CA.