25 states and cities sue Trump administration over EPA repeal of power plant emission limits

On October 1, 2026, a coalition of 25 states, cities, and counties led by New York Attorney General Letitia James filed a lawsuit in the U.S. Court of Appeals for the D.C. Circuit challenging the Environmental Protection Agency's repeal of the 2024 Carbon Pollution Standards for power plants. The coalition argues the repeal was arbitrary and unlawful, failing to consider health and climate costs, and will worsen the climate crisis. The lawsuit also includes a notice of intent to sue over EPA's failure to regulate existing gas-fired power plants. The EPA had repealed the rule in September, claiming it would save the industry over $300 billion. This repeal is distinct from the March 2026 endangerment finding repeal, targeting the specific emission limits rather than the foundational scientific determination.