2060-AW68 202504 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, EPA issued the final Review of the Residual Risk and Technology Review for MATS that updated certain standards for coal- and oil-fired electric utility steam 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. EPA is now undertaking a new rulemaking to repeal this action in accordance with Executive Order 14192, "Unleashing Prosperity Through Deregulation" (90 FR 9065, February 6, 2025) and Executive Order 14154, "Unleashing American Energy" (90 FR 8353, January 29, 2025).

]]> Economically Significant First Time Published in The Unified Agenda Proposed Rule Stage Yes No Deregulatory 40 CFR Part 63 Subpart UUUUU 42 U.S.C 7601 42 U.S.C 7607(d) No NPRM 06/17/2025 90 FR 25535 NPRM Comment Period End 08/11/2025 Final Rule 12/00/2025 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 Sarah Benish 2060 Office of Air and Radiation OAR 909 541-5620 benish.sarah@epa.gov 109 T.W. Alexander Drive, 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