PFAS Regulations, Monitoring, and Testing

PFAS Regulations, Monitoring, and Testing

Loveland Reservoir Water Transfer.

In late March 2025, the Authority transferred 8,000 acre-feet of water from its Loveland Reservoir to Sweetwater Reservoir to secure a local cost-effective supply for its customers and dilute PFAS levels in the affected body of water. Preliminary data shows the transfer significantly reduced PFAS levels in the drinking water supply. Three key substances -PFOA, PFOS and PFHxS - all dropped from above response levels to well below response levels and close to notification levels for nearly every substance. More information about the transfer and the testing results was presented to the Authority Board at their meeting on April 9 and the data has been posted to the PFAS Education webpage.

Sweetwater Reservoir was also tested again in April 2025, as part of the Authority’s ongoing water quality testing protocols. The testing indicates that PFOS, PFHxS and PFOA are present at notification levels. This information was presented to the Board at their meeting on April 23, 2025. The full presentation of the Q3 test results is now available.  

Sweetwater Authority will complete one additional quarterly test in 2025 to fully assess PFAS levels and determine appropriate long-term solutions. Moving forward, the Department of Drinking Water (DDW) will allow Sweetwater Authority to take an average of the quarterly test results to provide the full annual average. As soon as information is available, we will share those results with customers.

All Sweetwater Authority drinking water currently meets state and federal safety standards.



  1. What is Sweetwater Authority doing to comply with the new EPA standards? Does Sweetwater Authority need to conduct additional testing?
  2. Why is the Environmental Protection Agency (EPA) updating PFAS standards? What is the new threshold for PFAS? How does it compare to the old threshold? When does Sweetwater Authority need to comply?
  3. What were the most recent testing results? Why would there be a fluctuation between the testing results? Why didn’t Sweetwater Authority detect this sooner?
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