EPA repeals 2024 power-plant carbon rules and moves to lock the door

Lee Zeldin chose a G20 energy meeting in Houston on 14 September to finish a job he had advertised for a year. The Environmental Protection Agency finalized a partial repeal of the 2024 Carbon Pollution Standards for coal and gas power plants and, in the same packet, proposed wiping out every remaining greenhouse-gas requirement for the sector under Clean Air Act section 111. The agency put the first move’s savings at $310 billion. The follow-on proposal, if it survives comment and court, would add about $370 million in direct compliance relief and, more important to the administration, remove the legal hook later presidents have used to write climate rules for electricity.

The 2024 standards, issued in the last year of the Biden administration, would have required long-serving coal units and certain new gas plants to capture about 90 percent of their carbon dioxide or retire. EPA at the time projected a 75 percent cut in sector carbon pollution from the 2005 peak. Power plants are the second-largest source of U.S. climate pollution after transport, close to a quarter of the national total. Zeldin said on Monday that those rules “exceeded the agency’s authority” because they demanded control technology that had not been adequately demonstrated and, in practice, forced plants to close rather than meet a standard they could keep running under.

That argument tracks the Supreme Court’s 2022 decision in West Virginia v. EPA, which limited how far the agency can push “generation shifting” from coal to gas and renewables under section 111. The Houston package goes further. The supplemental proposal would rescind the endangerment-style findings that treat fossil power-plant greenhouse gases as a regulated pollutant under that section. If a later court lets that stand, a future EPA would have to rebuild the legal foundation before it could write a new carbon rule for the fleet. Zeldin framed the pair of actions as the end of what he called a fifteen-year “war on coal” by the Obama and Biden administrations.

Industry groups that have pressed for the repeal got most of what they asked for. An older Obama-era efficiency standard for certain new gas units would remain only until the supplemental proposal is finalized. Coal plants that had been planning capture retrofits or early retirement calendars now have a different set of numbers to take to their state commissions. Environmental groups said they would sue within days. They argue the agency cannot declare that power-plant emissions have “no material impact on global climate change,” a line that appeared in Monday’s materials, without contradicting its own prior records and the physical inventory of U.S. emissions.

The timing was not accidental. Houston was hosting G20 energy ministers under an “energy abundance” banner. Oil prices were already high after damage to Saudi Arabia’s East-West pipeline and after Houthi and Iranian-linked strikes around the Gulf. Zeldin tied cheaper electricity to national security and to household bills for heat, transport, farming and manufacturing. Whether those bills fall depends on fuel prices, interconnection queues and how many coal units actually stay online once local air rules, ash disposal costs and age still apply. The federal carbon constraint was only one pressure among several.

Legal process will eat the next year. The final partial repeal can be challenged in the D.C. Circuit as soon as it appears in the Federal Register. The supplemental proposal faces a public hearing, a comment period and then a second final rule. States that run cap-and-trade systems, and states that have already written their own power-plant carbon limits, will keep those rules. The federal floor is what changed on Monday. Utilities with plants in both kinds of states will run two compliance books.

For plant towns the practical question is narrower. A coal unit that was slated to add capture gear by the early 2030s can now drop that capital plan unless a state forces it. A new gas plant that would have had to meet a tight carbon standard can be financed on heat-rate and capacity-market terms instead. Grid operators watching summer peaks will treat those decisions as extra megawatts that might remain available. Climate inventories will treat them as extra tons. Both readings can be true at once. The Houston announcement did not settle which one Congress or the next administration will try to reverse. It did settle what EPA will defend in court for the rest of this term.