# California Water Service Group

> California Water Service Group is a San Jose-based, publicly traded utility holding company providing water and wastewater services to more than 2.2 million people through subsidiaries in California, Hawaii, New Mexico, Washington, and Texas. Its business combines local utility operations, treatment expertise, infrastructure investment, and regulated rates.

- **Founded:** 1926
- **Headquarters:** San Jose, United States
- **Founders:** Christopher T. Chenery (Co-founder of Federal Water Service, the historical predecessor (1926)), Thomas Hollis Wiggin (Co-founder of Federal Water Service, the historical predecessor (1926)), George Lewis Ohrstrom (Co-founder of Federal Water Service, the historical predecessor (1926))
- **Products:** Drinking-water utility service, Wastewater utility service, Water conservation programs, Recycled water, Water infrastructure investment
- **Notable:** Centennial in 2026, tracing operating roots to 1926., Reported $517 million of infrastructure investment in 2025., First company patent awarded in 2016 for tank-overflow dechlorination.

## Products & services

- **Drinking-water utility service** — Water sourcing, treatment, quality testing, storage, distribution, and customer service through local utilities.
- **Wastewater utility service** — Collection and treatment services through subsidiaries, including systems in Hawaii, New Mexico, Washington, and Texas.
- **Water conservation programs** — Location-specific rebates, conservation kits, education, and irrigation-efficiency support for eligible customers.
- **Recycled water** — Supplies recycled water for appropriate uses; Group reports delivery of nearly 2.6 billion gallons in 2025.
- **Water infrastructure investment** — Construction and replacement of mains, treatment facilities, pumps, storage, and fire-protection infrastructure.
- **Tank overflow dechlorination assembly** — Employee-developed device uses dechlorination tablets to treat storage-tank overflow; received a patent in 2016.

## Achievements

- Centennial in 2026, tracing operating roots to 1926.
- Reported $517 million of infrastructure investment in 2025.
- First company patent awarded in 2016 for tank-overflow dechlorination.
- Completed 11 PFAS treatment plants by the end of 2025.
- Reports more than 630,000 water-quality tests during 2025.

## Latest updates

- **2026-10** — Priced $125 million in Group notes and $150 million in Cal Water mortgage bonds on October 15; closing expected by December 31, subject to conditions.
- **2026-10** — Hawaii regulator approved a Kapalua rate settlement recognizing $5.86 million in capital improvements and allowing about $1.94 million of additional annual revenue.
- **2026-09** — Began installing 3,780 feet of 8-inch water main in Palos Verdes Estates; completion expected by the end of November.
- **2026-08** — Announced the Harrison Road connection project, extending utility service to 27 customers with dry wells.
- **2026-07** — Second-quarter results reported $308.6 million of revenue and $56.5 million of net income; planned Nevada and Oregon acquisition remained subject to approvals.
- **2026-02** — Agreed to acquire Nexus Water Group systems in Nevada and Oregon for approximately $218 million, subject to adjustments, approvals, and closing conditions; expected closing by year-end.

## Links

- Website: https://www.calwatergroup.com
- LinkedIn: https://www.linkedin.com/company/calwatergroup
- Twitter/X: https://x.com/calwater
- YouTube: https://www.youtube.com/@californiawaterservice
- Instagram: https://www.instagram.com/calwater/
- Facebook: https://www.facebook.com/calwater

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Profile page: https://yespress.io/california-water-service-group
Published by YesPress — https://yespress.io
Last updated: 2026-10-22