{"abstract":"In this action, the U.S. Environmental Protection Agency (EPA) is supplementing its proposal to repeal all greenhouse gas (GHG) emission standards for fossil fuel-fired electric generating units (EGUs) to effectuate the best reading of Clean Air Act (CAA) section 111. We propose that CAA section 111 does not authorize the EPA to regulate emissions from power plants in response to global climate change concerns. For the multiple and independent reasons described herein, this additional rationale would also require rescinding the Administrator's contrary findings and determinations in 2015 and repealing all associated 2015 and 2024 GHG standards for the fossil fuel-fired EGU source category. In a separate action published concurrently with this supplemental notice, the EPA is finalizing the repeal of certain 2024 GHG standards for the fossil fuel-fired EGU source category on distinct legal and technical grounds. We are not reopening that final rule. Nor are we soliciting further comment on those issues through this supplemental notice, except to the extent that commenters believe the final rule bears on the distinct questions of statutory authority addressed herein.","action":"Supplemental notice of proposed rulemaking.","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/2026/09/17/2026-19072.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"60","title":40}],"citation":"91 FR 59002","comment_url":"http://www.regulations.gov/commenton/EPA-HQ-OAR-2025-0124-2920","comments_close_on":"2026-11-02","correction_of":null,"corrections":[],"dates":"Comments must be received on or before November 2, 2026. Comments on the information collection provisions submitted to the Office of Management and Budget (OMB) under the Paperwork Reduction Act (PRA) are best assured of consideration by OMB if OMB receives a copy of your comments on or before October 19, 2026. Please refer to the PRA section under \"Statutory and E.O. Reviews\" in this preamble for specific instructions.","disposition_notes":null,"docket_ids":["EPA-HQ-OAR-2025-0124","FRL-12674.1-01-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":"Net Power Reports Third Quarter 2025 Results and Provides Business Update","document_id":"EPA-HQ-OAR-2025-0124-2977"},{"title":"US EIA US Industrial Natural Gas Consumption Expected to Hit Records in 2026 and 2027","document_id":"EPA-HQ-OAR-2025-0124-2976"},{"title":"US DOE - Project Selections for Broad Agency Announcement DE-FOA-0003605","document_id":"EPA-HQ-OAR-2025-0124-2975"},{"title":"China Launches Worlds Largest Coal Fired Carbon Capture Project","document_id":"EPA-HQ-OAR-2025-0124-2972"},{"title":"US EIA Power Monthly August 2023","document_id":"EPA-HQ-OAR-2025-0124-2970"},{"title":"US DOT Annual Report Mileage for Hazardous Liquid or CO2 Systems","document_id":"EPA-HQ-OAR-2025-0124-2965"}],"agency_name":"EPA","documents":[{"comment_count":10416,"comment_start_date":"2026-09-17","updated_at":"2026-10-23T01:56:35.121-04:00","comment_url":"https://www.regulations.gov/commenton/EPA-HQ-OAR-2025-0124-2920","allow_late_comments":false,"id":"EPA-HQ-OAR-2025-0124-2920","comment_end_date":"2026-11-03","regulations_dot_gov_open_for_comment":true}],"supporting_documents_count":166,"id":"EPA-HQ-OAR-2025-0124","title":"Repeal of Greenhouse Gas Emissions Standards for Fossil Fuel-Fired Electric Generating Units"}],"document_number":"2026-19072","effective_on":null,"end_page":59046,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/09/17/2026-19072.xml","html_url":"https://www.federalregister.gov/documents/2026/09/17/2026-19072/rescission-of-the-greenhouse-gas-findings-for-fossil-fuel-fired-power-plants-and-repeal-of","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-19072?publication_date=2026-09-17","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-09-17/2026-19072/mods.xml","not_received_for_publication":null,"page_length":45,"page_views":{"count":4783,"last_updated":"2026-10-23 22:15:05 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-09-17/pdf/2026-19072.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-19072.pdf?1789562713","publication_date":"2026-09-17","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/09/17/2026-19072.txt","regulation_id_number_info":{"2060-AX00":null},"regulation_id_numbers":["2060-AX00"],"regulations_dot_gov_info":{"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":"Net Power Reports Third Quarter 2025 Results and Provides Business Update","document_id":"EPA-HQ-OAR-2025-0124-2977"},{"title":"US EIA US Industrial Natural Gas Consumption Expected to Hit Records in 2026 and 2027","document_id":"EPA-HQ-OAR-2025-0124-2976"},{"title":"US DOE - Project Selections for Broad Agency Announcement DE-FOA-0003605","document_id":"EPA-HQ-OAR-2025-0124-2975"},{"title":"China Launches Worlds Largest Coal Fired Carbon Capture Project","document_id":"EPA-HQ-OAR-2025-0124-2972"},{"title":"US EIA Power Monthly August 2023","document_id":"EPA-HQ-OAR-2025-0124-2970"},{"title":"US DOT Annual Report Mileage for Hazardous Liquid or CO2 Systems","document_id":"EPA-HQ-OAR-2025-0124-2965"}],"comments_count":10416,"agency_id":"EPA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=EPA-HQ-OAR-2025-0124","supporting_documents_count":166,"docket_id":"EPA-HQ-OAR-2025-0124","document_id":"EPA-HQ-OAR-2025-0124-2920","regulation_id_number":null,"title":"Repeal of Greenhouse Gas Emissions Standards for Fossil Fuel-Fired Electric Generating Units","checked_regulationsdotgov_at":"2026-10-24T01:55:06Z"},"regulations_dot_gov_url":"http://www.regulations.gov/commenton/EPA-HQ-OAR-2025-0124-2920","significant":null,"signing_date":null,"start_page":59002,"subtype":null,"title":"Rescission of the Greenhouse Gas Findings for Fossil Fuel-Fired Power Plants and Repeal of Regulations for Power Plant Greenhouse Gas Emissions Under Clean Air Act Section 111","toc_doc":"Rescission of the Greenhouse Gas Findings for Fossil Fuel-Fired Power Plants and Repeal of Regulations for Power Plant Greenhouse Gas Emissions Under Clean Air Act Section 111","toc_subject":null,"topics":[],"type":"Proposed Rule","volume":91}