{"abstract":"This final action revises or affirms the initial air quality designations for 14 counties associated with seven nonattainment areas for the 2015 primary and secondary National Ambient Air Quality Standards (NAAQS) for ozone. In a July 10, 2020, decision, the District of Columbia Circuit Court remanded to the Environmental Protection Agency (EPA or Agency), but did not vacate, the April 30, 2018, designations for 16 counties associated with nine nonattainment areas located in seven states. In response, the EPA has re-evaluated the designations for the remanded counties by applying a uniform, nationwide analytical approach and interpretation of the designation provisions of the Clean Air Act (CAA) in considering the specific facts and circumstances of the areas using only data and information available at the time of the original designations. In this final action, the EPA is revising the designations and/or boundaries of 13 counties associated with six nonattainment areas in four states (Illinois, Indiana, Missouri, and Wisconsin) and is affirming the April 30, 2018, designation of one county associated with a nonattainment area in Michigan. The EPA is addressing the two additional remanded counties associated with two nonattainment areas in a separate Federal Register document.","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/2021/06/14/2021-11454.html","cfr_references":[{"chapter":null,"citation_url":null,"part":81,"title":40}],"citation":"86 FR 31438","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"The effective date of this rule is July 14, 2021.","disposition_notes":null,"docket_ids":["EPA-HQ-OAR-2017-0548","FRL-10019-90-OAR"],"dockets":[],"document_number":"2021-11454","effective_on":"2021-07-14","end_page":31448,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2021/06/14/2021-11454.xml","html_url":"https://www.federalregister.gov/documents/2021/06/14/2021-11454/revised-air-quality-designations-for-the-2015-ozone-national-ambient-air-quality-standards","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2021-11454?publication_date=2021-06-14","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2021-06-14/2021-11454/mods.xml","not_received_for_publication":null,"page_length":11,"page_views":{"count":1016,"last_updated":"2026-04-04 18:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2021-06-14/pdf/2021-11454.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2021-11454.pdf?1623415517","publication_date":"2021-06-14","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2021/06/14/2021-11454.txt","regulation_id_number_info":{"2060-AV06":{"issue":"202104","html_url":"https://www.federalregister.gov/regulations/2060-AV06/revised-air-quality-designations-for-the-2015-ozone-national-ambient-air-quality-standards-response-","title":"Revised Air Quality Designations for the 2015 Ozone National Ambient Air Quality Standards; Response to the July 10, 2020 Court Decision","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202104&RIN=2060-AV06&operation=OPERATION_EXPORT_XML","priority_category":"Substantive, Nonsignificant"}},"regulation_id_numbers":["2060-AV06"],"regulations_dot_gov_info":{"supporting_documents":[{"title":"Updated memo documenting technical data sources used in 2015 Air Quality Designations","document_id":"EPA-HQ-OAR-2017-0548-0435"},{"title":"Letter dated April 13, 2018, to Chuck Carr Brown, Secretary, Louisiana Department of Environmental Protection, from Anne Idsal, Regional Administrator, EPA Region 6, concurring on Louisiana's exceptional event demonstration for an event on September 14, 2017, affecting the Dutchtown ozone monitor","document_id":"EPA-HQ-OAR-2017-0548-0386"},{"title":"Letter dated March 13, 2018, from Guy Donaldson, USEPA Region 6, to Jason Meyers, Louisiana Department of Environmental Quality, indicating that Louisiana's 2017 ambient ozone data has met all the data quality requirements","document_id":"EPA-HQ-OAR-2017-0548-0384"},{"title":"Ohio: Cleveland and Columbus Nonattainment Areas, Final Area Designations for the 2015 Ozone National Ambient Air Quality Standards Technical Support Document (TSD)","document_id":"EPA-HQ-OAR-2017-0548-0381"},{"title":"3-6-2018 email from H. Kaloz Ohio EPA","document_id":"EPA-HQ-OAR-2017-0548-0367"},{"title":"York PA Missing Days Submittal","document_id":"EPA-HQ-OAR-2017-0548-0332"},{"title":"EPA concurrence with Washoe County Health District's submittals, dated November 10, 2016, and April 14, 2017, that exceedances on August 18,  19, and 21, 2015, and July 2-3, 2016, were caused by exceptional events due to wildfires","document_id":"EPA-HQ-OAR-2017-0548-0114"},{"title":"Submittal of “Exceptional Events Demonstration for Ozone Exceedances in Washoe County, Nevada from the Trailhead Fire on July 2 through July 4, 2016”","document_id":"EPA-HQ-OAR-2017-0548-0109"},{"title":"Texas-El Paso Exceptional Event, EPA response Letter to TCEQ","document_id":"EPA-HQ-OAR-2017-0548-0099"},{"title":"Ozone Monitor Status Report for 2014-2016","document_id":"EPA-HQ-OAR-2017-0548-0064"}],"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-2017-0548","supporting_documents_count":313,"docket_id":"EPA-HQ-OAR-2017-0548","document_id":"EPA-HQ-OAR-2017-0548-0441","regulation_id_number":null,"title":"Air Quality Designations and Classifications for the 2015 Ozone Standards","checked_regulationsdotgov_at":"2021-06-15T03:30:08Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":31438,"subtype":null,"title":"Revised Air Quality Designations for the 2015 Ozone National Ambient Air Quality Standards","toc_doc":"Revised Air Quality Designations for the 2015 Ozone National Ambient Air Quality Standards","toc_subject":null,"topics":["Air pollution control","Environmental protection","National parks","Wilderness areas"],"type":"Rule","volume":86}