Final rule · 2025-16744

National Emission Standards for Hazardous Air Pollutants for the Polyether Polyols Production Industry: Removal of Affirmative Defense

The U.S. Environmental Protection Agency (EPA) is finalizing amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Polyether Polyols (PEPO) Production under the Clean Air Act (CAA). Specifically, for this NESHAP, the EPA is finalizing the removal of affirmative defense provisions associated with the violation of air emission standards due to malfunctions.