PFAS Remediation
Zone 7 catches roughly two-thirds of known PFAS contamination today. We need to close the gap and pursue cost recovery from the polluters.
Per- and polyfluoroalkyl substances (PFAS) are forever chemicals linked to cancer and developmental harm. Zone 7 has been filtering for 18 months and catches roughly two-thirds of contamination known to be in the water today. We need to close the remaining gap, and we need to make sure ratepayers do not subsidize cleanup the polluters owe.
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
Close the remaining gap with the next round of treatment upgrades. Pursue cost recovery from the contamination sources so ratepayers do not subsidize cleanup the polluters owe. Hold staff and contractors accountable to public milestones on the Mocho construction timeline.