California Water Service Group Tops Newsweek’s 2026 ‘World’s Greenest Companies’ List — California Water Service Group

Event summary

California Water Service Group (CWT) named to Newsweek’s 2026 ‘World’s Greenest Companies’ list, one of only two water utilities globally recognized.
Ranking based on 25+ sustainability metrics across greenhouse gas emissions, water usage, waste generation, and disclosures.
Company previously included in Newsweek’s ‘America’s Greenest Companies’ list in October 2025.
CWT serves 2.2 million people across five U.S. states through its regulated subsidiaries.

The big picture

CWT’s inclusion in Newsweek’s ‘World’s Greenest Companies’ underscores the growing importance of sustainability in utility sectors, where regulatory and investor pressures are driving operational shifts. As one of the largest water utilities in the U.S., CWT’s strategic focus on ESG could set a benchmark for peers, particularly as climate-related disclosures become mandatory in more jurisdictions. The recognition also highlights how utilities are increasingly judged on environmental stewardship alongside traditional metrics like reliability and affordability.

What we're watching

Sustainability Leadership: Whether CWT can maintain its position as a top-ranked utility in global sustainability rankings amid increasing competition.
Regulatory Alignment: How the company’s ESG commitments will influence regulatory scrutiny and potential policy changes in water utility sectors.
Investor Appeal: The pace at which ESG-focused investors will prioritize CWT in portfolios, given its consistent recognition in sustainability rankings.