California Water Service Group

California Water Service Group is a U.S. water and utilities holding company headquartered in San Jose, California. Its core business involves providing regulated and non-regulated water and wastewater utility services. The company's mission is to deliver quality utility services, ensuring the health and safety of its customers and communities, and to be a leading provider of sustainable water and wastewater services, thereby enhancing the quality of life for its stakeholders.

Through its subsidiaries, California Water Service Group offers a comprehensive range of services, including the production, purchase, storage, treatment, testing, distribution, and sale of water for domestic, industrial, public, and irrigation uses, alongside providing fire protection services. It also handles wastewater collection and treatment. The company serves diverse market segments, including residential, commercial, industrial, and governmental entities across California, Hawaii, New Mexico, Texas, and Washington. Residential customers constitute the largest portion of its connections and revenue.

As the third-largest investor-owned publicly traded water utility in the United States, California Water Service Group maintains a significant market position. Recent developments include the California Public Utilities Commission's final decision in April 2026 on the company's 2024 General Rate Case and Infrastructure Improvement Plan, which is expected to increase revenues and support infrastructure investments through 2027. The company also reported its Q1 2026 earnings, showing increased revenue but a decrease in net income. Led by Chairman and CEO Martin A. Kropelnicki, the company was recognized as a "Top Workplace in the USA" by USA Today for the second consecutive year in April 2026 and is celebrating its centennial year of operations.