States, Cities Sue EPA Over Repeal Of Endangerment Finding
A coalition of states and cities sued in the D.C. Circuit to overturn the EPA's revocation of the 2009 endangerment finding that underpinned federal climate rules.
USA TODAYCalifornia sues over EPA repeal of greenhouse gas protection
New York PostEPA sued by two dozen states, 10 cities over repeal of ‘endangerment’ finding
Al JazeeraUS states file lawsuit challenging Trump’s revocation of climate finding
Joe.My.God.24 States Sue Over EPA Ending Climate Change Battle - Joe.My.God.
Overview
States and local governments filed a lawsuit in the U.S. Court of Appeals for the D.C. Circuit challenging the EPA's repeal of the 2009 endangerment finding, according to court filings and state announcements.
The repeal revoked the 2009 finding that determined carbon dioxide and other greenhouse gases threaten public health and welfare and underpinned Clean Air Act climate regulations, sources said.
New York Attorney General Letitia James said the rescission abandons a core responsibility, and California officials announced a coordinated legal challenge on March 19, officials said.
The litigation was joined by roughly 23 to 25 states and about 9 to 10 cities plus several counties, including New York, California, Massachusetts, Boston, Los Angeles and San Francisco, filings said.
The suit seeks to reinstate the endangerment finding and reverse the EPA's elimination of federal greenhouse gas tailpipe standards, and follows an earlier suit by public health and environmental groups, filings said.
Analysis
Center-leaning sources frame the story as a partisan rollback of science-based safeguards: editorial language stresses 'reversal', 'repeal' and 'denial', foregrounds critical voices (state attorney general, Obama) and highlights large cities suing, while casting administration defenses as official statements or Trump quotes—emphasizing public-health and climate-expert concerns.
FAQ
The 2009 Endangerment Finding by the EPA determined that carbon dioxide and other greenhouse gases threaten public health and welfare, serving as the basis for federal climate regulations under the Clean Air Act.
The Trump EPA repealed it on February 12, 2026, arguing that Section 202(a) of the Clean Air Act does not authorize regulating motor vehicle GHG emissions for global climate change, citing Supreme Court decisions like West Virginia v. EPA and Loper Bright.
Approximately 23-25 states including New York, California, and Massachusetts, and 9-10 cities including Boston, Los Angeles, and San Francisco, plus several counties.
The suit seeks to reinstate the 2009 Endangerment Finding, reverse the repeal of federal greenhouse gas tailpipe standards for vehicles, and challenges the EPA's actions as unlawful.
The case is in the U.S. Court of Appeals for the D.C. Circuit, likely heading to the Supreme Court; it tests EPA's authority and could reinstate or uphold the repeal, with litigation taking months or years.
