Twenty six US states and cities sue the EPA over Trump's rollback of power plant carbon pollution standards

Twenty six Democratic led states and cities filed suit against the Trump administration's Environmental Protection Agency after it repealed rules limiting greenhouse gas emissions from coal and natural gas power plants. The coalition filed its challenge with the US Court of Appeals for the DC Circuit, the court that hears most major federal regulatory disputes. New York is leading the group, which also includes Pennsylvania's governor, the District of Columbia, New York City, Chicago, and the city and county of Denver.

The plaintiffs argue that repealing the rules will gut one of the country's most significant climate protections and set the United States back decades on emissions reduction. The breadth of the coalition is notable: it spans state attorneys general, a sitting governor, and major city governments, signalling coordinated legal strategy rather than a scattered response. The DC Circuit is the appropriate venue because it has jurisdiction over challenges to EPA rulemakings of national scope.

For European ESG practitioners, the case carries practical weight even if it unfolds entirely within US jurisdiction. Companies with US operations or supply chains that feed into ESRS E1 Scope 3 disclosures will need to track whether power sector emissions baselines in the US shift as a result of this regulatory reversal. If the rollback holds, corporate emissions profiles tied to US electricity consumption could worsen relative to previously published projections, creating audit complications for CSRD reporters who rely on grid emission factors.

The case will now proceed through briefing and argument at the DC Circuit before any substantive ruling is issued. Timelines for federal environmental litigation at that court can run from several months to over a year. Companies with material US power sector exposure in their Scope 2 or Scope 3 inventories should flag the proceeding to their legal and sustainability teams now rather than waiting for an outcome.

The Democratic coalition framed the EPA's action as worsening the climate crisis and described the repeal as one of the most consequential regulatory reversals in recent US environmental history. Whether the court agrees will depend on arguments about the EPA's statutory authority under the Clean Air Act, a legal terrain that has been contested since the Supreme Court's 2022 West Virginia v EPA decision. The outcome will carry signal value well beyond the US, influencing how multinational companies model future regulatory risk in American markets.