Data / Federal rules / 2025-04653

National Emission Standards for Hazardous Air Pollutants: Chemical Manufacturing Area Sources Technology Review; Comment Period Extension

The Environmental Protection Agency published this proposed rule in the Federal Register on March 20, 2025. It took effect on January 22, 2025. Comments closed on April 14, 2025.

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What the agency says

On January 22, 2025, the U.S. Environmental Protection Agency (EPA) proposed a rule titled "National Emission Standards for Hazardous Air Pollutants: Chemical Manufacturing Area Sources Technology Review." The EPA is extending the comment period on this proposed rule, which was scheduled to close on March 24, 2025. The comment period will now remain open until April 14, 2025, to allow additional time for stakeholders to review and comment on the proposal.

Key facts

Document number: 2025-04653
Type: Proposed rule
Action: Proposed rule; extension of public comment period
Agency: Environmental Protection Agency
Published: March 20, 2025
Takes effect: January 22, 2025
Comments due: April 14, 2025
Dates: The public comment period for the proposed rule published in the Federal Register (FR) on January 22, 2025, (90 FR 7942) is being extended by 21 days. Written comments must now be received on or before April 14, 2025.
Docket: EPA-HQ-OAR-2024-0303; FRL-7623-03-OAR
Regulation ID (RIN): 2060-AU73
Code of Federal Regulations: 40 CFR 63
Pages: 2

The document on federalregister.gov PDF

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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.