The U.S. Environmental Protection Agency is proposing to give drinking water systems additional time to comply with federal PFAS standards for PFOA and PFOS, while leaving the enforceable limits themselves unchanged.
Read the full announcement here.
Under the proposed rule announced May 18, utilities would be able to request a two-year compliance extension, moving the deadline from 2029 to 2031 for the two compounds. The current Maximum Contaminant Levels of 4 parts per trillion for both PFOA and PFOS would remain in place.
For utilities, the proposal amounts to a recognition of the practical realities surrounding PFAS implementation. EPA repeatedly cites the time required for treatment design, construction, financing, workforce availability, and operational startup as reasons many systems may struggle to meet the original timeline.
“Without additional time for this work, costly violations could be levied,” the agency states in supporting materials. “Such violations will not accelerate public health protections.”
The proposal does not pause monitoring or reporting obligations. Utilities would still be required to continue sampling, reporting results, and notifying customers under the framework established in the 2024 PFAS drinking water rule.
Systems with sample results at or above 12 ppt for PFOA or PFOS would also be required to implement short-term mitigation measures during the extension period to reduce customer exposure.
At the same time, EPA is separately proposing to rescind or reconsider regulations tied to several additional PFAS compounds, including PFHxS, PFNA, GenX, and associated hazard index mixtures. That move could narrow the scope of the broader 2024 PFAS regulatory framework while preserving the agency’s approach to PFOA and PFOS.
For utilities already deep into PFAS planning, the proposal introduces a mixed dynamic. The core compliance requirements for PFOA and PFOS remain firmly in place, but the implementation timeline may become more flexible depending on system conditions and exemption eligibility.
The proposal also reflects a broader issue facing the water sector: the growing gap between regulatory timelines and the physical process of delivering infrastructure. Across the industry, utilities continue balancing PFAS treatment planning alongside rising construction costs, workforce constraints, supply chain delays, and uncertainty surrounding future federal funding levels.
EPA will accept public comments on the proposed rule for 60 days following publication in the Federal Register, with a virtual public hearing scheduled for July 7, 2026.
