Groundwater Awareness Week - Zone 7
Zone 7 Highlights PFAS Treatment Protecting Tri-Valley Drinking Water During Groundwater Awareness Week New video demystifies the state-of-the-art Ion Exchange Process LIVERMORE, Calif. (March 10, 2026) – Zone 7 Water Agency (Zone 7) continues to invest in groundwater treatment infrastructure to ensure the Tri-Valley’s drinking water remains safe from per- and polyfluoroalkyl substances (PFAS), commonly known as “forever chemicals.” Zone 7 has two Ion Exchange (IX) PFAS treatment plants in operation and is
Zone 7 Water Agency Wins Engineering Excellence Awards for Stoneridge PFAS Treatment Plant
Zone 7 Water Agency has received two prestigious engineering awards from the American Council of Engineering Companies (ACEC) for the Stoneridge PFAS Treatment Plant: an Engineering Excellence Honor Award and a National Recognition Award. With financial support from a $16 million grant from the State of California’s Sustainable Groundwater Management Program, Zone 7 completed construction of the Stoneridge PFAS Treatment Plant in the fall of 2022, the first facility in Northern California designed to remove

