Which EPA rules got undone in 2025, and which ones are still in court?

"A coalition of 19 attorneys general filed the suit on Tuesday in the D.C. Circuit Court of Appeals regarding the EPA’s final rule that extended deadlines for companies to stop using HFCs for refrigeration."

"The EPA is taking this final action in response to a September 5, 2025, decision of the U.S. Court of Appeals for the District of Columbia (DC) Circuit which reversed the EPA's 2023 Affirmative Defense Rule."

"In fact, several industry trade groups have joined states and advocacy organizations in filing petitions challenging the administration’s rollback of the existing rule."

"On Monday, the Natural Resources Defense Council filed a similar lawsuit, saying the rollback will hurt industries trying to reduce greenhouse gas emissions."

"On September 5, 2025, the court issued a decision finding that the 2023 Affirmative Defense Rule rested entirely on erroneous legal justifications."

"For example, remote condensing units commonly used in supermarkets, convenience stores, and bakeries would be allowed to continue using refrigerants with nearly ten times the global warming potential previously permitted until 2032."

"These lawsuits join others filed by five industry groups"

"The EPA rescinded it on Feb. 12, saying the agency had taken the “single largest deregulatory action in American history.”"

"On January 12, 2026, the court issued its mandate in the case."

"ACCA, HARDI, and PHCC expressed support for EPA’s decision to eliminate installation restrictions on existing R-410A residential and light commercial split-system air conditioners and heat pumps."

"A group of Democratic-led states, counties, and cities sued the Environmental Protection Agency on Thursday over the Trump administration’s rollback of the finding that greenhouse gas emissions are harmful to public health."

"Several environmental and public health groups have filed a lawsuit days after the Environmental Protection Agency repealed most Biden-era rules limit"

"The court's decision invalidated the 2023 Affirmative Defense Rule, and the EPA is now taking action to rescind the rule."

"The American Public Health Association last month led a coalition of environmental and advocacy groups in suing the EPA over the rollback."

"The Obama-era finding on greenhouse gas emissions underpinned almost all climate change mitigation measures by the federal government, including standards that regulate emissions from tailpipes."

"All 23 states with Democratic attorneys general signed on to the lawsuit along with Washington, D.C., and the United States Virgin Islands."

"in response to comments received on the proposed rescission of the Greenhouse Gas Reporting Program (GHGRP)."

"CEQ issued an interim final rule rescinding its regulations at 40 CFR parts 1500-1508, effective on April 11, 2025, and issued a final rule on January 8, 2026."

"This action rescinds the IFR, in effect reinstituting the compliance deadlines from the 2024 final rule."

"published a final rule titled ``Rescission of Title V Emergency Affirmative Defense Rule.''"

"for the remaining nine segments of subpart W, the EPA proposed to suspend program reporting requirements until reporting year 2034."

"E.O. 14154, Unleashing American Energy (90 FR 8353, Jan. 29, 2025), rescinded E.O. 11991, directed the CEQ to rescind its regulations implementing NEPA, and directed Federal agencies, including the EPA, to revise their NEPA procedures"

"On July 8, 2025, the Agency issued an IFR that extended the compliance dates for fenceline monitoring, PQBS MACT standards, leak limits for doors, lids, and offtakes, and HNR oven door requirements to"

"carried out the mandate of the U.S. Court of Appeals for the D.C. Circuit in SSM Litigation Group v. EPA, 150 F.4th 593 (D.C. Cir. 2025)"

"As a result, the EPA no longer expects the compliance cost savings estimated in the EIA to occur."

"prior to their removal following the 2023 Affirmative Defense Rule"

"contains the typographical error ``bought my'' in the first sentence"

"Through a series of press releases and a public address by Administrator Lee Zeldin, the EPA outlined 31 planned actions aimed at rescinding, revising or reconsidering existing environmental rules and policies."

"is proposing to repeal all greenhouse gas (GHG) emissions standards for fossil fuel-fired power plants."

"President Trump signed Public Law No. 119-2 , a CRA joint resolution of Congress, disapproving of an EPA rule issued last November that established methane emissions charges under the Inflation Reduction Act’s Methane Emissions Reduction Program."

"In this final rule, the U.S. Environmental Protection Agency (EPA) is repealing most provisions of the 2024 Carbon Pollution Standards for greenhouse gas (GHG) emissions from fossil fuel-fired electric generating units (EGUs) based on a reevaluation of the best system of emission reduction for the relevant subcategories."

"The EPA is finalizing its proposal to repeal the more stringent fPM emission standard and the corresponding total and individual non-Hg HAP metal standards that were promulgated in the 2024 Final Rule and to revert to the limits set in the 2012 MATS Rule, which reduce risk to acceptable levels and provide an ample margin of safety."

"The administration recently signaled that it may reconsider last year’s PFAS rules by requesting stays in ongoing litigation challenging each action"

"the EPA is finalizing only the alternative proposal in the June 2025 NPRM--that is, the proposal to repeal the emission guidelines for existing steam generating"

"the repeal of the fPM compliance demonstration requirement, and the repeal of the revised Hg emission standard for lignite-fired units, and each is severable should there be judicial review."

"The EPA is not, in this rulemaking, finalizing the primary proposal in the June 2025 NPRM to repeal all GHG regulations for fossil fuel-fired EGUs under CAA section 111"

"If a court were to invalidate any one of these elements of the final rule, the EPA intends the remainder of this action to remain effective."

"If a court were to invalidate one or more of those actions, the EPA would still be able to implement the repeal of the remaining action or actions."

"The President's exemption is for a period of two years beyond the 2024 Final Rule's compliance date (i.e., for the period beginning July 8, 2027, and concluding July 8, 2029)."

"is $160 billion using a three percent discount rate and $95 billion using a seven percent discount rate."