EPA announces major regulatory reviews, overhauls
The Environmental Protection Agency (EPA) announced on March 12, 2025, that it’s taking 31 actions to advance President Trump’s Day One executive orders and the recently announced “Powering the Great American Comeback” Initiative. The agency’s actions will likely impact environmental regulations across various industries.
Rules under review
EPA will reconsider an assortment of rulemakings, including:
- The Clean Power Plan 2.0 (which sets carbon dioxide emission limits on new gas-fired combustion turbines and emissions guidelines for existing coal, oil, and gas-fired steam generating units),
- Oil and gas emission limits for new and existing sources (40 CFR Part 60 Subparts OOOOb and OOOOc),
- The Greenhouse Gas (GHG) Reporting Program (GHGRP) for petroleum and natural gas systems (Part 98 Subpart W),
- The GHGRP overall (Part 98),
- Mercury Air Toxics Standards for coal- and oil-fired power plants (Part 63 Subpart UUUUU),
- Effluent limitation guidelines (ELGs) for the steam electric power generating industry (Part 423),
- Treated wastewater use and discharge for coal-fired power plants (Part 435 Subpart E),
- The Risk Management Program rule (Part 68),
- Vehicle GHG rules (including the light-, medium-, and heavy-duty vehicle regulations),
- The 2009 Endangerment Finding (relied on for seven federal vehicle rules) and related regulations and actions (Chapter I),
- The Technology Transition Rule for refrigerant systems (Part 84 Subpart B),
- The National Ambient Air Quality Standards for fine particulate matter, or PM2.5 (Parts 50, 53, and 58),
- The National Emission Standards for Hazardous Air Pollutants (Part 63) for:
- Iron and steel manufacturing,
- Rubber tire manufacturing,
- Synthetic organic chemical manufacturing,
- Commercial sterilizers for medical devices and spices,
- Lime manufacturing,
- Coke ovens,
- Copper smelting, and
- Taconite ore processing.
- The Exceptional Events rulemaking related to allowing prescribed fires within State Implementation Plans, or SIPs (Parts 50–51),
- The Regional Haze Program implementing regulations (51.308), and
- The Good Neighbor Plan (Parts 52, 75, 78, and 97).
The agency will also take other actions, such as:
- Working with the U.S. Army Corps of Engineers to finalize the definition of “waters of the United States” related to Clean Water Act permits,
- Updating enforcement discretion by revising the National Enforcement and Compliance Initiatives, and
- Prioritizing the coal ash program to expedite state permit reviews and update the coal ash regulations (including amending the Legacy Coal Combustion Residuals Surface Impoundments and CCR Management Units rule).
About EPA’s new initiative
In February 2025, the agency announced the Powering the Great American Comeback Initiative, which outlines EPA’s priorities. The initiative consists of five pillars:
- Clean air, land, and water;
- Restore energy dominance;
- Permitting reforms, cooperative federalism, and cross-agency partnership;
- Make the U.S. the artificial intelligence capital of the world; and
- Protect and bring back American auto jobs.
EPA’s 31 actions will primarily address the first three pillars.
Key to remember: EPA will reconsider major rulemakings that may impact a variety of industries.