PFAS Remediation
Zone 7 has built two PFAS treatment plants with a third in design. Continue the program, monitor downstream of every facility, and publish the math so the community can read it.
Per- and polyfluoroalkyl substances (PFAS) are forever chemicals linked to cancer and developmental harm. Zone 7 has been filtering since September 2023 and the agency's engineering team is ahead of the federal regulatory deadline. The next board's job is to continue the program, monitor downstream of every facility, and publish the math so ratepayers and residents can see the numbers.
Sources
The two known PFAS sources in the Zone 7 service area are the Livermore Municipal Airport and a regional fire training center. Both used aqueous film-forming foams that contaminated local groundwater.
Current state
Zone 7 has built ion exchange treatment plants ahead of the federal regulatory deadline. The Stoneridge Well facility came online in September 2023, the first of its kind in Northern California. The Chain of Lakes plant opened in March 2025 and is the largest of its kind in the region. The Mocho PFAS Treatment Plant is in design, with construction expected late 2026 and completion targeted for Summer 2028.
What I will do
Continue Zone 7's PFAS treatment program on schedule. Monitor downstream of every facility so the data keeps pace with what the models predict. Publish the math behind rate decisions tied to PFAS capital work. Where independent analysis would strengthen public trust — on the groundwater model, on the monitoring plan — run it and share the results.
More than the tap
Safe source water protects more than the tap. Livermore Valley wineries, food and beverage processors, and the region's life-science and technology employers all rely on Zone 7 water at tolerances beyond the federal minimums. Continuing the PFAS treatment program on schedule, and monitoring downstream of every facility, protects the household, the employer, and the arroyo habitat that sits downstream of each discharge point.