{"abstract":"In this final action, the U.S. Environmental Protection Agency (EPA) is finalizing a significant contribution finding (SCF) for purposes of regulating source categories for greenhouse gas (GHG) emissions, under section 111(b) of the Clean Air Act (CAA) for electric generating units (EGUs), and in doing so, reaffirming that EGUs remain a listed source category. The EPA has reached that conclusion by articulating a framework under which source categories are considered to contribute significantly to dangerous air pollution due to their GHG emissions if the amount of those emissions exceeds 3 percent of total U.S. GHG emissions. The EPA is applying the 3-percent threshold to the EGU source category to demonstrate that GHG emissions from the EGU source category would contribute significantly to dangerous air pollution. While EGU GHG emissions exceed this threshold by a sufficient magnitude to warrant an SCF without more ado, the EPA has also, for completeness, analyzed EGU emissions under a secondary criteria framework, which also demonstrates the propriety of the SCF.","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/2021/01/13/2021-00389.html","cfr_references":[{"chapter":null,"citation_url":null,"part":60,"title":40}],"citation":"86 FR 2542","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"The final rule is effective on March 15, 2021.","disposition_notes":null,"docket_ids":["EPA-HQ-OAR-2013-0495","FRL-10019-30-OAR"],"dockets":[],"document_number":"2021-00389","effective_on":"2021-03-15","end_page":2558,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2021/01/13/2021-00389.xml","html_url":"https://www.federalregister.gov/documents/2021/01/13/2021-00389/pollutant-specific-significant-contribution-finding-for-greenhouse-gas-emissions-from-new-modified","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2021-00389?publication_date=2021-01-13","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2021-01-13/2021-00389/mods.xml","not_received_for_publication":null,"page_length":17,"page_views":{"count":4414,"last_updated":"2026-04-22 16:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2021-01-13/pdf/2021-00389.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2021-00389.pdf?1610459127","publication_date":"2021-01-13","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2021/01/13/2021-00389.txt","regulation_id_number_info":{"2060-AT56":{"issue":"202010","html_url":"https://www.federalregister.gov/regulations/2060-AT56/review-of-standards-of-performance-for-greenhouse-gas-emissions-from-new-modified-and-reconstructed-","title":"Review of Standards of Performance for Greenhouse Gas Emissions From New, Modified, and Reconstructed Stationary Sources: Electric Utility Generating Units","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202010&RIN=2060-AT56&operation=OPERATION_EXPORT_XML","priority_category":"Other Significant"}},"regulation_id_numbers":["2060-AT56"],"regulations_dot_gov_info":{"supporting_documents":[{"title":"Letter from Gina McCarthy, EPA to Allison Wood, UARG. Denial of Petition for Reconsideration. April 29, 2016.","document_id":"EPA-HQ-OAR-2013-0495-11924"},{"title":"Letter from Gina McCarthy, EPA to Chaim Mandelbaum, Energy and Environmental Legal Institute. Denial of Petition for Reconsideration. April 29, 2016.","document_id":"EPA-HQ-OAR-2013-0495-11923"},{"title":"Cost of New Entry Estimates for Combustion Turbine and Combined Cycle Plants in PJM","document_id":"EPA-HQ-OAR-2013-0495-11917"},{"title":"SaskPower - Carbon Capture Test Facility at Shand","document_id":"EPA-HQ-OAR-2013-0495-11915"},{"title":"SaskPower, Large Piece of SaskPower Equipment Makes its way from Saskatoon to Estevan  Press Release September 14, 2015","document_id":"EPA-HQ-OAR-2013-0495-11914"},{"title":"Adragna, Anthony. \"Heitkamp Sees Way Forward for ‘Polarized' Coal Issue\" BNA Snapshot. February 4, 2016","document_id":"EPA-HQ-OAR-2013-0495-11909"},{"title":"Feb 3, 2016 Letter to Kevin Brady and Sander Levin, US Committee on Ways and Means, regarding Section 45Q Tax Credits for Carbon Dioxide Sequestration","document_id":"EPA-HQ-OAR-2013-0495-11908"},{"title":"Coal Creek Dried Lignite Emissions","document_id":"EPA-HQ-OAR-2013-0495-11905"},{"title":"Memorandum - Meeting with GE Regarding Proposed 111(b) Rule for New Construction of Power Plants, November 13, 2014","document_id":"EPA-HQ-OAR-2013-0495-11266"},{"title":"Lucia Oliva Hennelly, Citizen","document_id":"EPA-HQ-OAR-2013-0495-11258"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2060-AT56/review-of-standards-of-performance-for-greenhouse-gas-emissions-from-new-modified-and-reconstructed-","title":"Review of Standards of Performance for Greenhouse Gas Emissions From New, Modified, and Reconstructed Stationary Sources: Electric Utility Generating Units"},"comments_count":0,"agency_id":"EPA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=EPA-HQ-OAR-2013-0495","supporting_documents_count":812,"docket_id":"EPA-HQ-OAR-2013-0495","document_id":"EPA-HQ-OAR-2013-0495-12746","regulation_id_number":"2060-AT56","title":"Review of Standards of Performance for Greenhouse Gas Emissions from New, Modified, and Reconstructed Stationary Sources: Electric Utility Generating Units Standards of Performance for Greenhouse Gas Emissions for New Stationary Sources: Electric Utility Generating Units (2015 Rule)","checked_regulationsdotgov_at":"2021-01-15T04:30:12Z"},"regulations_dot_gov_url":null,"significant":true,"signing_date":null,"start_page":2542,"subtype":null,"title":"Pollutant-Specific Significant Contribution Finding for Greenhouse Gas Emissions From New, Modified, and Reconstructed Stationary Sources: Electric Utility Generating Units, and Process for Determining Significance of Other New Source Performance Standards Source Categories","toc_doc":"Electric Utility Generating Units, and Process for Determining Significance of Other New Source Performance Standards Source Categories","toc_subject":"Pollutant-Specific Significant Contribution Finding for Greenhouse Gas Emissions from New, Modified, and Reconstructed Stationary Sources:\n","topics":[],"type":"Rule","volume":86}