PFAS Observer
The U.S. Environmental Protection Agency (EPA) has proposed major amendments to the 2024 National Primary Drinking Water Regulations (NPDWR) for per- and polyfluoroalkyl substances (PFAS) in the form of two proposed rules published on May 20, 2026. The proposals would extend compliance deadlines while preserving enforceable limits for two PFAS compounds, PFOA and PFOS, and rescind drinking water standards for four additional PFAS compounds.
In “EPA Proposes Major Changes to PFAS Drinking Water Rule,” Reza Zarghamee and Cara M. MacDonald explain why the proposals mark a significant shift from the Biden administration’s April 2024 PFAS National Primary Drinking Water Regulation, which established nationwide enforceable standards for drinking water for six PFAS compounds.