{"abstract":"The Clean Air Act (CAA) requires each state implementation plan (SIP) to contain adequate provisions prohibiting emissions that will significantly contribute to nonattainment or interfere with maintenance of air quality in other states. The State of Arizona submitted SIP revisions to the Environmental Protection Agency (EPA) to address these requirements for the 2012 fine particulate matter (PM<INF>2.5</INF>) national ambient air quality standards (NAAQS). The EPA is finalizing approval of Arizona's SIP submission as meeting the requirement that the Arizona SIP contains adequate provisions to prohibit emissions activity, within the State, from emitting air pollutants in amounts that will significantly contribute to nonattainment or interfere with maintenance of the 2012 PM<INF>2.5</INF> NAAQS in any other state.","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/2026/04/16/2026-07400.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"52","title":40}],"citation":"91 FR 20365","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This rule is effective May 18, 2026.","disposition_notes":null,"docket_ids":["EPA-R09-OAR-2025-0191","FRL-12978-02-R9"],"dockets":[],"document_number":"2026-07400","effective_on":"2026-05-18","end_page":20368,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/04/16/2026-07400.xml","html_url":"https://www.federalregister.gov/documents/2026/04/16/2026-07400/air-plan-approval-arizona-interstate-transport-requirements-for-the-2012-fine-particulate-matter","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-07400?publication_date=2026-04-16","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-04-16/2026-07400/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":47,"last_updated":"2026-04-16 14:15:05 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-04-16/pdf/2026-07400.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-07400.pdf?1776257118","publication_date":"2026-04-16","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/04/16/2026-07400.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"supporting_documents":[{"title":"Docket Index for Air Plan Approval; Arizona; Interstate Transport Requirements for the 2012 Fine Particulate Matter National Ambient Air Quality Standard, Final Rule","document_id":"EPA-R09-OAR-2025-0191-0011"},{"title":"C.01 Technical Support Document_Air Plan Approval of AZ PM2.5 ISIP Transport Elements","document_id":"EPA-R09-OAR-2025-0191-0008"},{"title":"Docket Index for Approval of AZ PM2.5 ISIP Transport Elements","document_id":"EPA-R09-OAR-2025-0191-0006"},{"title":"D.01. Air Plan Approval; Arizona; Interstate Transport Requirements for the 2012 Fine Particulate Matter National Ambient Air Quality Standard, 90 FR 48502, October 23, 2025.","document_id":"EPA-R09-OAR-2025-0191-0005"},{"title":"C. Supporting Documents for Rulemaking","document_id":"EPA-R09-OAR-2025-0191-0004"},{"title":"B. State Plans, State Submittals, Support Documents, Reports, and Correspondence","document_id":"EPA-R09-OAR-2025-0191-0003"},{"title":"A. U.S. EPA Guidance Documents, Policies, and Rulemakings","document_id":"EPA-R09-OAR-2025-0191-0002"}],"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-R09-OAR-2025-0191","supporting_documents_count":7,"docket_id":"EPA-R09-OAR-2025-0191","document_id":"EPA-R09-OAR-2025-0191-0010","regulation_id_number":null,"title":"Approval of Air Quality State Implementation Plans; 2012 PM2.5 Interstate Transport Requirements","checked_regulationsdotgov_at":"2026-04-16T18:00:39Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":20365,"subtype":null,"title":"Air Plan Approval; Arizona; Interstate Transport Requirements for the 2012 Fine Particulate Matter National Ambient Air Quality Standards","toc_doc":"Arizona; Interstate Transport Requirements for the 2012 Fine Particulate Matter National Ambient Air Quality Standards","toc_subject":"Air Quality State Implementation Plans; Approvals and Promulgations","topics":["Air pollution control","Environmental protection","Incorporation by reference","Intergovernmental relations","Ozone","Reporting and recordkeeping requirements","Volatile organic compounds"],"type":"Rule","volume":91}