2060-AW68 202510 The Regulatory Plan and the Unified Agenda of Federal Regulatory and Deregulatory Actions 2060 Office of Air and Radiation OAR 2000 Environmental Protection Agency EPA Repeal of Amendments to National Emission Standards for Hazardous Air Pollutants: Coal- and Oil-Fired Electric Utility Steam Generating Units

In 2024, the EPA issued a risk and technology review for Mercury and Air Toxics Standards (MATS) that updated certain standards for coal- and oil-fired electric generating units (EGUs). Specifically, the rule updated the filterable particulate matter standard (surrogate for the non-mercury hazardous air pollutant metals) for existing coal-fired EGUs, the mercury standard for lignite coal-fired EGUs, and revised the particulate matter compliance demonstration requirements to only allow particulate matter continuous emission monitoring systems. On June 17, 2025, the EPA published a proposal (90 FR 25535) to repeal these changes.

]]> Economically Significant Previously Published in The Unified Agenda Completed Actions Yes No Deregulatory 40 CFR Part 63 Subpart UUUUU 42 U.S.C 7601 42 U.S.C 7607(d) Yes NPRM 06/17/2025 90 FR 25535 Final Rule 02/24/2026 91 FR 9088 Final Rule Effective 04/27/2026 Docket #: EPA-HQ-OAR-2018-0794. No No Federal Local State No No https://www.epa.gov/stationary-sources-air-pollution/mercury-and-air-toxics-standards 221112 Fossil Fuel Electric Power Generation 221122 Electric Power Distribution 921150 American Indian and Alaska Native Tribal Governments No No 2060-AV53 Related to Christopher Werner 2060 Office of Air and Radiation OAR 919 541-5133 werner.christopher@epa.gov 109 T.W. Alexander Drive, Mail Code D243-01, Research Triangle Park NC 27711 Nick Hutson 2060 Office of Air and Radiation OAR 919 541-2968 919 541-4991 hutson.nick@epa.gov 109 T.W. Alexander Drive, Mail Code D243-01, Research Triangle Park NC 27711