{"abstract":"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. Specifically, the EPA is repealing the emission guidelines for existing fossil fuel-fired steam generating units, the carbon capture and sequestration/storage (CCS)-based standards for coal-fired steam generating units undertaking a large modification, and the CCS-based standards for new base load stationary combustion turbines (i.e., Phase 2 standards). In a separate action published concurrently with this final rule, the EPA is issuing a supplemental proposal soliciting comment on additional reasons to rescind all GHG emission requirements for fossil fuel-fired EGUs to effectuate the best reading of Clean Air Act (CAA) section 111 and ensure consistency with applicable principles of administrative law beyond those reasons on which the EPA solicited comment in the June 2025 notice of proposed rulemaking.","action":"Final rule.","agencies":[{"raw_name":"ENVIRONMENTAL PROTECTION AGENCY","name":"Environmental Protection Agency","id":145,"url":"https://www.federalregister.gov/agencies/environmental-protection-agency","json_url":"https://www.federalregister.gov/api/v1/agencies/145","parent_id":null,"slug":"environmental-protection-agency"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2026/09/17/2026-19071.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"60","title":40}],"citation":"91 FR 58954","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This final rule is effective on November 16, 2026. The approval of the Director of the Federal Register (FR) for incorporation by reference (IBR) of certain material listed in this rule expires as of November 16, 2026.","disposition_notes":null,"docket_ids":["EPA-HQ-OAR-2025-0124","FRL-12674-02-OAR"],"dockets":[{"supporting_documents":[{"title":"Regulatory Impact Analysis for the Final Partial Repeal of the Carbon Pollution Standards for Fossil Fuel-Fired Electric Generating Units","document_id":"EPA-HQ-OAR-2025-0124-2994"},{"title":"Subpart TTTT RLSO Memo - Final Partial Repeal of the Carbon Pollution Standards for Fossil Fuel-Fired Electric Generating Units","document_id":"EPA-HQ-OAR-2025-0124-2991"},{"title":"List of EO12866 Meetings - Final Partial Repeal of the Carbon Pollution Standards for Fossil Fuel-Fired Electric Generating Units 2026","document_id":"EPA-HQ-OAR-2025-0124-2986"},{"title":"State of the Art CCS Technologies 2025","document_id":"EPA-HQ-OAR-2025-0124-2983"},{"title":"US EIA Power Monthly October 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