Data / Federal rules / 2025-16744

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

The Environmental Protection Agency published this final rule in the Federal Register on September 2, 2025. It took effect on September 2, 2025.

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What the agency says

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.

Key facts

Document number: 2025-16744
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: September 2, 2025
Takes effect: September 2, 2025
Dates: This final rule is effective on September 2, 2025.
Docket: EPA-HQ-OAR-2023-0509; FRL-11651-04-OAR
Regulation ID (RIN): 2060-AW56
Code of Federal Regulations: 40 CFR 63
Topics: Administrative practice and procedure; Air pollution control; Environmental protection; Hazardous substances; Intergovernmental relations; Reporting and recordkeeping requirements
Pages: 6

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on administrative practice and procedure · Rules on air pollution control · Rules on environmental protection · Published in September 2025

Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.