Twenty-one states sue EPA over repeal of power plant carbon emission standards

Coalition challenges EPA in federal court

A coalition of 21 states, the District of Columbia, and multiple cities filed a petition for review on Thursday in the US Court of Appeals for the District of Columbia Circuit. The legal action challenges the Environmental Protection Agency's decision to repeal greenhouse gas emission limits for coal- and gas-fired power plants. Led by New York Attorney General Letitia James, the plaintiff coalition includes California, Michigan, the governor of Pennsylvania, New York City, Chicago, and the city and county of Denver. The group also sent an intent-to-sue letter notifying the agency of planned legal action regarding its failure to regulate emissions from gas-fired generation facilities. The lawsuit asks the federal appellate court to review the administrative decision and strike down the repeal.

The repealed 2024 carbon standards

The contested regulations, established in 2024 during the Biden administration, set carbon dioxide limits under the Clean Air Act. Under those rules, existing coal-fired electricity facilities were required to install carbon capture systems and eliminate nearly all planet-warming emissions by 2039 or cease operations. The framework also established strict carbon caps for newly built natural gas power plants. Electric utilities and nearly two dozen Republican-led states, headed by West Virginia, had previously filed legal challenges against the rules, arguing that the technical mandates would destabilize power grids. The coalition of attorneys general now contends that discarding these rules ignores the documented public health and environmental consequences of fossil-fueled generation.

Letitia James addressed the impact of the federal rollback in a statement released on Thursday.

Dismantling these protections is a betrayal of American families, and the stakes are too high to allow this administration to once again put profits over people.

Deregulation strategy and administrative arguments

The EPA announced the revocation of the 2024 standards in September 2026, stating that greenhouse gas emissions from power plants do not meet statutory criteria for endangerment under the Clean Air Act. By asserting that the agency lacks legal authority to enforce sector-wide carbon limits, the administration aims to prevent future executives from reinstating comparable rules. Agency officials estimated that removing the emission mandates would save the electricity industry more than $300 billion in compliance and capital expenses. EPA Assistant Administrator Aaron Szabo stated in September that the policy change permits utilities to make cost-effective choices for ratepayers rather than shutting down operational plants. The coalition's lawsuit contends that the agency acted arbitrarily and failed to evaluate reasonable regulatory alternatives before rescinding the standards.

Broader legal and environmental context

Electricity generation ranks as the second-largest source of carbon emissions in the United States, according to federal regulatory data. The lawsuit filed in Washington represents the latest step in a multi-year dispute between state attorneys general and federal regulators over the scope of the Clean Air Act. While the EPA maintains that deregulation lowers energy costs and encourages domestic generation, the state coalition argues that the federal government failed to account for the health expenses associated with increased air pollution. The DC Circuit court will review the administrative record to decide whether the EPA complied with federal procedural and statutory requirements when executing the rollback.

Letitia James emphasized the long-term stakes of the litigation in an accompanying statement.

Future generations are going to pay the price for our federal government's callous disregard for Americans' health and the environment.