On May 20, 2026, the U.S. Environmental Protection Agency (EPA) published two proposed rules concerning per- and polyfluoroalkyl substances (PFAS). These proposals were titled “Rescission of Regulatory Determinations and Removal of Related Provisions for Four PFAS Substances (PFHxS, PFNA, HFPO-DA (GenX)), and the Mixture of These Three PFAS Plus PFBS)” and “Extending the Compliance Deadline for the PFOA and PFOS Maximum Containment Levels.”
The first proposal would offer water systems the opportunity to extend the compliance date for regulating two types of PFAS (PFOS and PFOA) by two years. The second proposal would rescind the provisions of EPA rules regulating four additional types of PFAS: PFHxS, PFNA, HFPA-DA, and PFNA.
Advocacy supports both of the EPA’s proposed rules, stressing that they allow the EPA to fulfill its obligations under Loper Bright, EO 14303, Restoring Gold Standard Science, and the Regulatory Flexibility Act. Additionally, the EPA’s proposals directly respond to Advocacy’s 2023 concerns about a lack of flexibility and transparency for small water systems in the agency’s 2024 PFAS drinking water regulation.
COMMENT LETTER:
Rescission of Regulatory Determinations and Removal of Related Provisions for Four PFAS Substances
(PDF, 254 KB)
CONTACT: Nick Goldstein
EMAIL: nick.goldstein@sba.gov
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