2025 Annual Consumer Confidence Report Confirms High Quality of Zone 7 Water

LIVERMORE, Calif. (June 12, 2026) – Zone 7 Water Agency has released its 2025 Consumer Confidence Report (CCR), providing Tri-Valley residents and businesses with detailed information about the quality of their drinking water and the Agency's ongoing efforts to protect public health through monitoring, treatment, and infrastructure investments.

The annual report confirms that all drinking water supplied by Zone 7 met or performed better than state and federal drinking water standards in 2025. The report also highlights several major initiatives underway to proactively protect water quality, strengthen water supply reliability, and prepare for emerging water quality challenges through continued investments in monitoring, treatment, and infrastructure.

"Our highest priority is protecting public health and delivering safe, reliable water to the communities we serve," said Zone 7 General Manager Valerie Pryor. "This year's Consumer Confidence Report reflects the investments we have made in monitoring, testing, treatment, and infrastructure to ensure our water continues to meet or exceed state and federal drinking water standards. Through our PFAS Clean initiative and other proactive water quality programs, we are continuing to address emerging challenges while maintaining the high-quality drinking water our customers expect."

The latest report on Tri-Valley water quality is now available online, allowing residents to dive deep into the details of their local water—from its sources and rigorous monitoring to safety, testing, and results—presented with easy-to-understand graphs and infographics.

The Annual Consumer Confidence Report is available to download through the Zone 7 website at zone7waterca.gov/water-quality.

Highlights from the 2025 Consumer Confidence Report include:

• PFAS Clean Water — The report highlights Zone 7's ongoing PFAS Clean initiative, which combines extensive monitoring, advanced treatment technology, and strategic infrastructure investments to address PFAS in local groundwater.
• Expanding PFAS Treatment Facilities — Following the successful implementation of PFAS treatment at the Stoneridge and Chain of Lakes wellfields, design is underway for a third PFAS treatment facility at the Mocho Wellfield. Together, these projects represent Zone 7's long-term commitment to protecting groundwater resources and maintaining water supply reliability.
• Ongoing Water Quality Monitoring — Zone 7 conducts thousands of water quality tests each year throughout its treatment, storage, and distribution systems to ensure compliance with state and federal drinking water regulations and to identify potential issues before they affect customers.
•  Investment in Water System Reliability — In addition to water quality programs, Zone 7 continues investing in critical infrastructure, treatment facilities, groundwater management, and water supply projects that help ensure a safe and reliable water supply for current and future generations.
• Preparing for Future Chromium-6 Regulations — Zone 7 continues evaluating treatment technologies and planning future infrastructure improvements to address potential chromium-6 regulatory requirements. These efforts reflect the Agency's proactive approach to protecting water quality and ensuring long-term compliance with evolving drinking water standards.

Consumer Confidence Reports are required annually by the U.S. Environmental Protection Agency and the California State Water Resources Control Board. The reports provide customers with information about drinking water sources, testing results, regulatory standards, and water quality programs.

Additional questions on water quality may be directed to the Zone 7 water quality team at [email protected] or 925-454-5748.
About Zone 7 Water
Zone 7 Water Agency is one of the 10 active zones of the Alameda County Flood Control and Water Conservation
District. The District was established by the State Legislature in October 1949 to solve problems of flooding,
drainage, channel erosion and water supply and conservation in Alameda County. In 1957, by popular vote, Zone 7
became a special district governed by a seven-member board of directors. Along with flood protection, Zone 7
supplies water to all of eastern Alameda County and a population of over a quarter million residents. Treated
water is sold wholesale to local retailers, including the cities of Livermore and Pleasanton, the Dublin San Ramon
Services District, and the California Water Service Company. Zone 7 also distributes untreated water to local
agriculture operations and golf courses.