EPA Finalizes Repeal of Power Plant Carbon Standards, Proposes Broader Rollback Under Trump Administration

On September 14, 2026, U.S. EPA Administrator Lee Zeldin announced the final repeal of the majority of the Biden administration's 2024 Carbon Pollution Standards for fossil fuel-fired power plants, projecting savings of over $310 billion while proposing to rescind all remaining greenhouse gas emissions requirements for the power sector. The action, delivered at a G20 Energy Abundance Ministerial in Houston, completes a series of Trump administration efforts to unwind Obama- and Biden-era climate policies, arguing that prior rules exceeded Clean Air Act authority by mandating inadequately demonstrated technologies like carbon capture and storage (CCS) and effectively forcing plant retirements. Official EPA documents and contemporaneous reporting confirm the proposal originated in June 2025, with the agency estimating annual compliance cost savings around $1.2 billion from dropping emission guidelines and CCS mandates. Environmental and municipal groups, including Climate Mayors, C40 Cities, and Columbia Law School's Sabin Center for Climate Change Law, submitted formal opposition letters in August 2025, highlighting cities' reliance on the standards for infrastructure protection, public health, and indirect emissions reductions in buildings and transportation. Related litigation has targeted parallel rollbacks, such as the 2009 endangerment finding and Mercury and Air Toxics Standards updates. The power sector remains the second-largest U.S. GHG source; the moves are expected to face immediate legal challenges from states and cities. Broader context includes prior EPA actions rescinding vehicle standards and the endangerment finding, potentially limiting future administrations' regulatory options under the Clean Air Act.