Response and Long-Term Solutions

The health and safety of our customers is our top priority. Since learning of PFAS in Sweetwater Reservoir, Sweetwater Authority has completed the required year-long PFAS monitoring, explored a blending strategy to keep PFAS concentrations below state and federal response thresholds, launched a comprehensive outreach and education effort with customers and key stakeholders and made progress toward long-term solutions by hiring technical experts to evaluate the best options for treatment of PFAS in the water supply. The Authority will continue to keep customers informed as additional testing is completed and as progress is made toward identifying and implementing long-term PFAS treatment solutions.

Implementing Long-Term PFAS Solution Planning

As part of Sweetwater Authority’s long-term PFAS mitigation planning, engineering consultant Tetra Tech was hired in May 2025 to provide technical updates to the Authority’s Governing Board and the community. These updates will include analysis of existing PFAS data, treatment options under evaluation, estimated costs and recommendations to support compliance with new EPA regulations. Tetra Tech’s updates will occur at key milestones throughout the planning process. 

At its Dec. 5 meeting, the Sweetwater Authority Board approved the selection of Carollo Engineers Inc. as the pilot study partner to evaluate the viability of long-term PFAS treatment solutions. The pilot study is expected to conclude in late 2026 or early 2027, identifying a long-term treatment approach to advance into planning, design and construction ahead of the EPA’s April 2029 compliance deadline.