Power Plants: 40 CFR Part 60, [EPA-HQ-OAR-2025-0124; FRL-12674-01-OAR], RIN 2060-AW55
On Wednesday, June 11, 2025, the U.S. Environmental Protection Agency (EPA) proposes repealing all greenhouse gas (GHG) emissions standards for fossil fuel-fired power plants. The EPA proposes that the Clean Air Act (CAA) section 111 requires it to find that GHG emissions from fossil fuel-fired power plants contribute significantly to dangerous air pollution as a predicate to regulating GHG emissions from those plants, which the current administration does not agree with.
The EPA is further proposing to make a finding that GHG emissions from fossil fuel-fired power plants do not contribute significantly to dangerous air pollution.
The EPA is also proposing, as an alternative, to repeal a set of requirements that includes the emission guidelines for existing fossil fuel-fired steam generating units, the carbon capture and sequestration/storage (CCS)-based standards for coal-fired steam generating units undertaking a large modification, and the CCS-based standards for new base load stationary combustion turbines.
EPA is proposing to repeal certain amendments issued in 2024 to the National Emission Standards for Hazardous Air Pollutants for Coal- and Oil-Fired Electric Utility Steam Generating Units – a rule commonly known as the Mercury and Air Toxics Standards for power plants, or simply MATS. This proposal would revert to 2012 standards for air toxic pollutants from coal- and oil-fired power plants.
This action proposes to relieve all facilities of the more stringent filterable particulate matter (PM) emission standard for coal-fired EGUs, the tighter mercury standard for lignite-fired EGUs, and the requirement to use PM Continuous Emissions Monitoring Systems (CEMS).
Comment Period
Public and industry comments must be received on or before 45 days following publication in the Federal Register. This document is a prepublication version, signed by EPA Administrator Lee Zeldin on 06/11/2025. While the EPA has taken steps to ensure the accuracy of this version, it is not the official version.
The EPA will hold a virtual public hearing in the future. You may send comments identified by Docket ID No. EPA-HQ-OAR-2025-0124, using these channels as follows:
All submissions received must include the Docket ID No. for this rulemaking. Comments received may be posted without change to https://www.regulations.gov, including any personal information provided.
Please get in touch with SCS Engineers with questions pertaining to your power plant operations or facilities. Thank you. We will post regulatory updates in more detail as they unfold.
