California Water Service Group

California Water Service Group (NYSE: CWT) is a holding company providing water and wastewater utility services to approximately two million people across the western United States. The company operates through seven subsidiaries: California Water Service Company, Washington Water Service Company, New Mexico Water Service Company, Hawaii Water Service Company, Texas Water Service Company, and two utility services entities. The company's website is www.calwatergroup.com.

The company's core business involves the production, purchase, storage, treatment, testing, distribution, and sale of water for domestic, industrial, public, and irrigation uses, along with wastewater collection and treatment services in select areas. California Water Service Company, the original operating company founded in 1926, represents the largest portion of operations, serving approximately 500,000 customer connections across 20 separate districts in California and accounting for 89.0% of total customer connections and 91.2% of consolidated operating revenue. The company operates as a single reportable segment focused on water and wastewater services.

Beyond its core regulated utility operations, the company provides non-regulated services including full water system operation, meter reading, billing services, lab services, and communication antenna site leasing. The company operates municipally owned water systems under lease agreements, including the City of Hawthorne and City of Commerce systems in California.

Geographically, the company serves customers across California, Hawaii, Washington, New Mexico, and Texas. Hawaii Water serves approximately 6,800 connections across multiple islands, Washington Water serves approximately 38,500 connections in the Tacoma and Olympia areas, New Mexico Water serves approximately 11,800 connections, and Texas Water serves approximately 4,900 connections through its BVRT subsidiary. The company maintains long-term water supply agreements with wholesale suppliers and operates both adjudicated and managed groundwater basins, with approximately half of annual water supply historically sourced from wells.

The company is regulated by state public utilities commissions in each jurisdiction where it operates, including the California Public Utilities Commission, Hawaii Public Utilities Commission, Washington Utilities and Transportation Commission, New Mexico Public Regulation Commission, and Public Utilities Commission of Texas. In February 2026, the company entered into an agreement to acquire Nexus Water Group's Nevada and Oregon water and wastewater systems for approximately $218 million.