{"abstract":"The Detroit, Michigan area was redesignated to attainment of the 2015 ozone National Ambient Air Quality Standards (NAAQS) on May 19, 2023. On December 5, 2025, the United States Court of Appeals for the Sixth Circuit vacated the Environmental Protection Agency's (EPA's) redesignation of the Detroit area. Therefore, pursuant to the Court's decision, the EPA is making a technical amendment to the part 81 listing for the Detroit area to reflect the area's designation as nonattainment for the 2015 ozone NAAQS, with a classification of Moderate.","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/2026/05/29/2026-10768.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"81","title":40}],"citation":"91 FR 31953","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This final rule is effective on June 29, 2026.","disposition_notes":null,"docket_ids":["EPA-R05-OAR-2022-0004","FRL-13336-01-R5"],"dockets":[],"document_number":"2026-10768","effective_on":"2026-06-29","end_page":31954,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/05/29/2026-10768.xml","html_url":"https://www.federalregister.gov/documents/2026/05/29/2026-10768/designation-of-areas-for-air-quality-planning-purposes-michigan-technical-amendment","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-10768?publication_date=2026-05-29","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-05-29/2026-10768/mods.xml","not_received_for_publication":null,"page_length":2,"page_views":{"count":153,"last_updated":"2026-06-26 20:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-05-29/pdf/2026-10768.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-10768.pdf?1779972324","publication_date":"2026-05-29","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/05/29/2026-10768.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"supporting_documents":[{"title":"Detroit, Michigan 2015 8-Hour Ozone Redesignation and Maintenance Plan, 05/18/2026 supplement","document_id":"EPA-R05-OAR-2022-0004-0054"},{"title":"Detroit, Michigan 2015 8-Hour Ozone Redesignation and Maintenance Plan, 03/10/2026 supplement","document_id":"EPA-R05-OAR-2022-0004-0053"},{"title":"Web page - Detroit Clean Data Determination for the 2015 Ozone Air Quality Standard","document_id":"EPA-R05-OAR-2022-0004-0050"},{"title":"Supplemental Comments re EPA-R05-OAR-2022-0004","document_id":"EPA-R05-OAR-2022-0004-0048"},{"title":"Congressional Research Service COVID-19 and the US Economy Updated May 11 2021","document_id":"EPA-R05-OAR-2022-0004-0047"},{"title":"US Energy Information Coal Data Browser - Total consumption - electric power 2021","document_id":"EPA-R05-OAR-2022-0004-0046"},{"title":"Trends in Ozone Adjusted for Weather Conditions _ US EPA","document_id":"EPA-R05-OAR-2022-0004-0043"},{"title":"Monroe power plant 2014 NEI NOx emissions","document_id":"EPA-R05-OAR-2022-0004-0041"},{"title":"EJScreen Technical Document Appendix - October 2022 for EJScreen 2.1","document_id":"EPA-R05-OAR-2022-0004-0040"},{"title":"Technical Guidance for Assessing Environmental Justice in Regulatory Analysis June 2016","document_id":"EPA-R05-OAR-2022-0004-0037"}],"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-R05-OAR-2022-0004","supporting_documents_count":43,"docket_id":"EPA-R05-OAR-2022-0004","document_id":"EPA-R05-OAR-2022-0004-0052","regulation_id_number":null,"title":"Detroit, Michigan 2015 8-Hour Ozone Redesignation and Maintenance Plan","checked_regulationsdotgov_at":"2026-06-09T16:07:25Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":31953,"subtype":null,"title":"Designation of Areas for Air Quality Planning Purposes; Michigan; Technical Amendment","toc_doc":"Michigan","toc_subject":"Designation of Areas for Air Quality Planning Purposes","topics":["Air pollution control","Environmental protection","Wilderness areas"],"type":"Rule","volume":91}