Data / Federal rules / 2025-10992
National Emission Standards for Hazardous Air Pollutants: Coal- and Oil-Fired Electric Utility Steam Generating Units
The Environmental Protection Agency published this proposed rule in the Federal Register on June 17, 2025. Comments closed on August 11, 2025.
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What the agency says
In this action, the U.S. Environmental Protection Agency (EPA) is proposing to repeal specific amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Coal- and Oil-Fired Electric Utility Steam Generating Units (EGUs), commonly referred to as the Mercury and Air Toxics Standards (MATS), that were promulgated on May 7, 2024. The amendments that the EPA is proposing to repeal include the revised filterable particulate matter (fPM) emission standard, which serves as a surrogate for non-mercury hazardous air pollutant (HAP) metals for existing coal-fired EGUs; the revised fPM emission standard compliance demonstration requirements; and the revised mercury (Hg) emission standard for lignite-fired EGUs.
Key facts
- Document number
- 2025-10992
- Type
- Proposed rule
- Action
- Proposed rule
- Agency
- Environmental Protection Agency
- Published
- June 17, 2025
- Comments due
- August 11, 2025
- Dates
- Comments. Comments must be received on or before August 11, 2025. Comments on the information collection provisions of the proposed rule under the Paperwork Reduction Act (PRA) must be received by the Office of Management and Budget's Office of Information and Regulatory Affairs (OMB-OIRA) on or before July 17, 2025. For specific instructions, please refer to the PRA information in the "Statutory and Executive Order Reviews" section of this preamble.
- Docket
- EPA-HQ-OAR-2018-0794; FRL-6716.4-01-OAR
- Regulation ID (RIN)
- 2060-AW68
- 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
- Significant
- Yes, under Executive Order 12866
- Pages
- 12
Other documents from the Environmental Protection Agency
Everything from the Environmental Protection Agency · Rules on administrative practice and procedure · Rules on air pollution control · Rules on environmental protection · Published in June 2025
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