Data / Federal rules / 2026-05167

National Emission Standards for Hazardous Air Pollutants: Ethylene Oxide Emissions Standards for Sterilization Facilities Residual Risk and Technology Review Reconsideration

The Environmental Protection Agency published this proposed rule in the Federal Register on March 17, 2026. Comments closed on May 1, 2026.

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What the agency says

On April 5, 2024, the U.S. Environmental Protection Agency (EPA) published the National Emission Standards for Hazardous Air Pollutants (NESHAP): Ethylene Oxide Emissions Standards for Sterilization Facilities Residual Risk and Technology Review (2024 Final Rule). The 2024 Final Rule revised the Commercial Sterilization Facilities NESHAP based on a residual risk and technology review (RTR) pursuant to the Clean Air Act (CAA) sections. On March 12, 2025, the EPA announced that it was reconsidering the 2024 Final Rule. Based on its reconsideration of the RTR in the 2024 Final Rule, the EPA is proposing to amend the Commercial Sterilization Facilities NESHAP. The amendments would rescind the risk based standards, revise the standard for new aeration room vents that resulted from the technology review, revise the compliance demonstration requirements, and rescind a requirement related to permanent total enclosure (PTE). This proposal also includes technical corrections and clarifications to the Commercial Sterilization Facilities NESHAP and Performance Specification 19 to address erroneous cross-references, omissions of text, and typographical errors in the regulatory text that the EPA has identified after publication of the 2024 Final Rule.

Key facts

Document number: 2026-05167
Type: Proposed rule
Action: Proposed rule; reconsideration of final rule
Agency: Environmental Protection Agency
Published: March 17, 2026
Comments due: May 1, 2026
Dates: Comments must be received on or before May 1, 2026. Under the Paperwork Reduction Act (PRA), comments on the information collection provisions are best assured of consideration if the Office of Management and Budget (OMB) receives a copy of your comments on or before April 16, 2026.
Docket: EPA-HQ-OAR-2019-0178; FRL-7055.1-01-OAR
Regulation ID (RIN): 2060-AW79
Code of Federal Regulations: 40 CFR 63
Topics: Air pollution control; Environmental protection; Hazardous substances; Reporting and recordkeeping requirements
Significant: Yes, under Executive Order 12866
Pages: 37

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on air pollution control · Rules on environmental protection · Rules on hazardous substances · Published in March 2026

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