{"abstract":"The Environmental Protection Agency (EPA) is proposing to approve a state implementation plan (SIP) revision submitted by the State of West Virginia. This revision updates West Virginia's incorporation by reference (IBR) of EPA's national ambient air quality standards (NAAQS) and the associated monitoring reference and equivalent methods. This action is being taken under the Clean Air Act (CAA).","action":"Proposed 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/2025/06/11/2025-10548.html","cfr_references":[{"chapter":null,"citation_url":null,"part":52,"title":40}],"citation":"90 FR 24559","comment_url":null,"comments_close_on":"2025-07-11","correction_of":null,"corrections":[],"dates":"Written comments must be received on or before July 11, 2025.","disposition_notes":null,"docket_ids":["EPA-R03-OAR-2024-0581","FRL-12329-01-R3"],"dockets":[{"supporting_documents":[{"title":"WV Transmittal Letter to EPA - 45CSR8- Signed 07.18.2024","document_id":"EPA-R03-OAR-2024-0581-0003"},{"title":"WV 45CSR8 SIP Revision JULY 2024","document_id":"EPA-R03-OAR-2024-0581-0002"}],"agency_name":"EPA","documents":[{"comment_count":1,"comment_start_date":"2025-06-11","updated_at":"2025-07-12T01:56:26.279-04:00","comment_url":"https://www.regulations.gov/commenton/EPA-R03-OAR-2024-0581-0001","allow_late_comments":false,"id":"EPA-R03-OAR-2024-0581-0001","comment_end_date":"2025-07-12","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":2,"id":"EPA-R03-OAR-2024-0581","title":"Air Plan Approval; West Virginia; 2024 Amendments to West Virginia’s Ambient Air Quality Standards"}],"document_number":"2025-10548","effective_on":null,"end_page":24560,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2025/06/11/2025-10548.xml","html_url":"https://www.federalregister.gov/documents/2025/06/11/2025-10548/air-plan-approval-west-virginia-2024-amendments-to-west-virginias-ambient-air-quality-standards","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2025-10548?publication_date=2025-06-11","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2025-06-11/2025-10548/mods.xml","not_received_for_publication":null,"page_length":2,"page_views":{"count":146,"last_updated":"2026-04-04 12:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2025-06-11/pdf/2025-10548.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2025-10548.pdf?1749559513","publication_date":"2025-06-11","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2025/06/11/2025-10548.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"supporting_documents":[{"title":"WV Transmittal Letter to EPA - 45CSR8- Signed 07.18.2024","document_id":"EPA-R03-OAR-2024-0581-0003"},{"title":"WV 45CSR8 SIP Revision JULY 2024","document_id":"EPA-R03-OAR-2024-0581-0002"}],"comments_count":1,"agency_id":"EPA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=EPA-R03-OAR-2024-0581","supporting_documents_count":2,"docket_id":"EPA-R03-OAR-2024-0581","document_id":"EPA-R03-OAR-2024-0581-0001","regulation_id_number":null,"title":"Air Plan Approval; West Virginia; 2024 Amendments to West Virginia’s Ambient Air Quality Standards","checked_regulationsdotgov_at":"2025-07-13T08:55:02Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":24559,"subtype":null,"title":"Air Plan Approval; West Virginia; 2024 Amendments to West Virginia's Ambient Air Quality Standards","toc_doc":"2024 Amendments to West Virginia's Ambient Air Quality Standards","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":"Proposed Rule","volume":90}