US EPA and MassDEP News
US Environmental Protection Agency (EPA) Announces Plan to Rescind 2024 PFAS National Drinking Water Standards
On May 13, 2025, the US EPA announced plans to rescind and revise its national drinking water standards for PFAS. Key highlights include:
- The EPA plans to rescind and reconsider the Maximum Contaminant Levels (MCLs) for four PFAS compounds—PFHxS, PFNA, GenX, and PFBS—citing the need for further evaluation.
- EPA will uphold the existing MCLs of 4 ppt for PFOA and PFOS.
- Public water systems will now have until 2031 to comply with the PFOA and PFOS standards, providing additional time for infrastructure upgrades and treatment implementation.
US EPA plans to begin a new rulemaking process in the fall and to issue a new rule next spring.