{"abstract":"The Environmental Protection Agency (EPA) is approving a portion of a Utah State Implementation Plan (SIP) submission addressing interstate transport for the 2008 8-hour ozone national ambient air quality standard (NAAQS). The \"interstate transport\" provision requires that each state's SIP contain adequate provisions to prohibit emissions from within the state from significantly contributing to nonattainment or interfering with maintenance of the NAAQS in other states. In this action, the EPA is only addressing the requirement prohibiting interference with maintenance, referred to as \"prong 2,\" for the 2008 ozone NAAQS.","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/2025/11/10/2025-19824.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"52","title":40}],"citation":"90 FR 50742","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This rule is effective on December 10, 2025.","disposition_notes":null,"docket_ids":["EPA-R08-OAR-2025-0054","FRL-12595-02-R8"],"dockets":[{"supporting_documents":[{"title":"UT 2008 Ozone IT and 2015 Ozone ISIP 1-29-20 Submittal to EPA","document_id":"EPA-R08-OAR-2025-0054-0006"},{"title":"EPA Email Comments on Utah 08 Ozone Transport SIP Prong 2 Draft 6-18-19","document_id":"EPA-R08-OAR-2025-0054-0005"},{"title":"DRAFT Utah 2008 Ozone Transport SIP 5-8-19","document_id":"EPA-R08-OAR-2025-0054-0004"},{"title":"2015 Ozone NAAQS Transport Memo 03-27-18","document_id":"EPA-R08-OAR-2025-0054-0003"},{"title":"2008 Ozone NAAQS Transport Memo_10-27-17","document_id":"EPA-R08-OAR-2025-0054-0002"}],"agency_name":"EPA","documents":[{"comment_count":0,"comment_start_date":"2025-11-10","updated_at":"2025-11-10T09:55:27.847-05:00","comment_url":"https://www.regulations.gov/commenton/EPA-R08-OAR-2025-0054-0009","allow_late_comments":false,"id":"EPA-R08-OAR-2025-0054-0009","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":5,"id":"EPA-R08-OAR-2025-0054","title":"Utah Interstate Transport - 2008 Ozone Prong 2"}],"document_number":"2025-19824","effective_on":"2025-12-10","end_page":50743,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2025/11/10/2025-19824.xml","html_url":"https://www.federalregister.gov/documents/2025/11/10/2025-19824/air-plan-approval-utah-interstate-transport-of-air-pollution-for-the-2008-8-hour-ozone-national","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2025-19824?publication_date=2025-11-10","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2025-11-10/2025-19824/mods.xml","not_received_for_publication":null,"page_length":2,"page_views":{"count":235,"last_updated":"2026-07-26 04:15:02 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2025-11-10/pdf/2025-19824.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2025-19824.pdf?1762523108","publication_date":"2025-11-10","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2025/11/10/2025-19824.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"supporting_documents":[{"title":"UT 2008 Ozone IT and 2015 Ozone ISIP 1-29-20 Submittal to EPA","document_id":"EPA-R08-OAR-2025-0054-0006"},{"title":"EPA Email Comments on Utah 08 Ozone Transport SIP Prong 2 Draft 6-18-19","document_id":"EPA-R08-OAR-2025-0054-0005"},{"title":"DRAFT Utah 2008 Ozone Transport SIP 5-8-19","document_id":"EPA-R08-OAR-2025-0054-0004"},{"title":"2015 Ozone NAAQS Transport Memo 03-27-18","document_id":"EPA-R08-OAR-2025-0054-0003"},{"title":"2008 Ozone NAAQS Transport Memo_10-27-17","document_id":"EPA-R08-OAR-2025-0054-0002"}],"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-R08-OAR-2025-0054","supporting_documents_count":5,"docket_id":"EPA-R08-OAR-2025-0054","document_id":"EPA-R08-OAR-2025-0054-0009","regulation_id_number":null,"title":"Utah Interstate Transport - 2008 Ozone Prong 2","checked_regulationsdotgov_at":"2025-11-11T18:55:21Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":50742,"subtype":null,"title":"Air Plan Approval; Utah; Interstate Transport of Air Pollution for the 2008 8-Hour Ozone National Ambient Air Quality Standard","toc_doc":"Utah; Interstate Transport of Air Pollution for the 2008 8-hour Ozone National Ambient Air Quality Standard","toc_subject":"Air Quality State Implementation Plans; Approvals and Promulgations","topics":["Air pollution control","Carbon monoxide","Environmental protection","Incorporation by reference","Intergovernmental relations","Lead","Nitrogen dioxide","Ozone","Particulate matter","Reporting and recordkeeping requirements","Sulfur oxides","Volatile organic compounds"],"type":"Rule","volume":90}