{"abstract":"The Environmental Protection Agency (EPA) is proposing to approve the regional haze state implementation plan (SIP) revision submitted by the State of Oklahoma on August 9, 2022 (Oklahoma's 2022 SIP submission), to satisfy applicable requirements under the Clean Air Act (CAA) and the EPA's Regional Haze Rule (RHR) for the program's second implementation (planning) period. Oklahoma's SIP submission addresses the requirement that states must periodically revise their long-term strategies for making reasonable progress towards the national goal of preventing any future, and remedying any existing, anthropogenic impairment of visibility, including regional haze, in mandatory Class I Federal areas. The SIP submission also addresses other applicable requirements for the second implementation period of the regional haze program. The EPA is taking this action pursuant to the 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/2026/02/12/2026-02843.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"52","title":40}],"citation":"91 FR 6581","comment_url":null,"comments_close_on":"2026-03-16","correction_of":null,"corrections":[],"dates":"Written comments must be received on or before March 16, 2026.","disposition_notes":null,"docket_ids":["EPA-R06-OAR-2022-0736","FRL-9406-01-R6"],"dockets":[{"supporting_documents":[{"title":"OK042.13 ODEQ 2023 Oklahoma Annual Point Source Emission Summary","document_id":"EPA-R06-OAR-2022-0736-0013"},{"title":"OK042.12 EPA Clean Air Markets Program Data (CAMPD) 2000-2024 Annual Emissions for Oklahoma Facilities","document_id":"EPA-R06-OAR-2022-0736-0012"},{"title":"OK042.11 EPA 2020 National Emissions Inventory (NEI) Data for Oklahoma Facilities","document_id":"EPA-R06-OAR-2022-0736-0011"},{"title":"OK042.10 Public Service of Oklahoma (PSO) Northeastern Settlement Agreement dated October 17, 2012","document_id":"EPA-R06-OAR-2022-0736-0010"},{"title":"OK042.09 Continental Carbon Consent Decree and Amendment, Case Number: 5:15-cv-00290-F","document_id":"EPA-R06-OAR-2022-0736-0009"},{"title":"OK042.08 EPA Technical Support Document for the Oklahoma Regional Haze State Implementation Plan and Federal Implementation Plan (“2011 EPA Oklahoma Regional Haze SIP TSD”), March 2011","document_id":"EPA-R06-OAR-2022-0736-0008"},{"title":"OK042-07 EPA Guidance, “Guidance for Tracking Progress Under the Regional Haze Rule”, dated September 2003","document_id":"EPA-R06-OAR-2022-0736-0007"},{"title":"OK042.06 EPA Memorandum, “Recommendation for the Use of Patched and Substituted Data and Clarification of Data Completeness for Tracking Visibility Progress for the Second Implementation Period of the Regional Haze Program”, dated June 3, 2020","document_id":"EPA-R06-OAR-2022-0736-0006"},{"title":"OK042.05 EPA Memorandum, “Availability of Modeling Data and Associated Technical Support Document for the EPA's Updated 2028 Visibility Air Quality Modeling” (“EPA’s 2028 modeling”), dated September 19, 2019","document_id":"EPA-R06-OAR-2022-0736-0005"},{"title":"OK042.04 EPA Memorandum, “Guidance on Regional Haze State Implementation Plans for the Second Implementation Period”, dated August 20, 2019","document_id":"EPA-R06-OAR-2022-0736-0004"}],"agency_name":"EPA","documents":[{"comment_count":13,"comment_start_date":"2026-02-12","updated_at":"2026-03-17T01:56:20.741-04:00","comment_url":"https://www.regulations.gov/commenton/EPA-R06-OAR-2022-0736-0001","allow_late_comments":false,"id":"EPA-R06-OAR-2022-0736-0001","comment_end_date":"2026-03-17","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":12,"id":"EPA-R06-OAR-2022-0736","title":"OK042 Oklahoma Regional Haze State Implementation Plan Revision for the Second Planning Period, Submitted to EPA via cover letter dated August 12, 2022 (OK-74)"}],"document_number":"2026-02843","effective_on":null,"end_page":6603,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/02/12/2026-02843.xml","html_url":"https://www.federalregister.gov/documents/2026/02/12/2026-02843/approval-and-promulgation-of-air-quality-implementation-plans-oklahoma-regional-haze-state","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-02843?publication_date=2026-02-12","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-02-12/2026-02843/mods.xml","not_received_for_publication":null,"page_length":23,"page_views":{"count":373,"last_updated":"2026-07-27 04:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-02-12/pdf/2026-02843.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-02843.pdf?1770817514","publication_date":"2026-02-12","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/02/12/2026-02843.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"supporting_documents":[{"title":"OK042.13 ODEQ 2023 Oklahoma Annual Point Source Emission Summary","document_id":"EPA-R06-OAR-2022-0736-0013"},{"title":"OK042.12 EPA Clean Air Markets Program Data (CAMPD) 2000-2024 Annual Emissions for Oklahoma Facilities","document_id":"EPA-R06-OAR-2022-0736-0012"},{"title":"OK042.11 EPA 2020 National Emissions Inventory (NEI) Data for Oklahoma Facilities","document_id":"EPA-R06-OAR-2022-0736-0011"},{"title":"OK042.10 Public Service of Oklahoma (PSO) Northeastern Settlement Agreement dated October 17, 2012","document_id":"EPA-R06-OAR-2022-0736-0010"},{"title":"OK042.09 Continental Carbon Consent Decree and Amendment, Case Number: 5:15-cv-00290-F","document_id":"EPA-R06-OAR-2022-0736-0009"},{"title":"OK042.08 EPA Technical Support Document for the Oklahoma Regional Haze State Implementation Plan and Federal Implementation Plan (“2011 EPA Oklahoma Regional Haze SIP TSD”), March 2011","document_id":"EPA-R06-OAR-2022-0736-0008"},{"title":"OK042-07 EPA Guidance, “Guidance for Tracking Progress Under the Regional Haze Rule”, dated September 2003","document_id":"EPA-R06-OAR-2022-0736-0007"},{"title":"OK042.06 EPA Memorandum, “Recommendation for the Use of Patched and Substituted Data and Clarification of Data Completeness for Tracking Visibility Progress for the Second Implementation Period of the Regional Haze Program”, dated June 3, 2020","document_id":"EPA-R06-OAR-2022-0736-0006"},{"title":"OK042.05 EPA Memorandum, “Availability of Modeling Data and Associated Technical Support Document for the EPA's Updated 2028 Visibility Air Quality Modeling” (“EPA’s 2028 modeling”), dated September 19, 2019","document_id":"EPA-R06-OAR-2022-0736-0005"},{"title":"OK042.04 EPA Memorandum, “Guidance on Regional Haze State Implementation Plans for the Second Implementation Period”, dated August 20, 2019","document_id":"EPA-R06-OAR-2022-0736-0004"}],"comments_count":13,"agency_id":"EPA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=EPA-R06-OAR-2022-0736","supporting_documents_count":12,"docket_id":"EPA-R06-OAR-2022-0736","document_id":"EPA-R06-OAR-2022-0736-0001","regulation_id_number":null,"title":"OK042 Oklahoma Regional Haze State Implementation Plan Revision for the Second Planning Period, Submitted to EPA via cover letter dated August 12, 2022 (OK-74)","checked_regulationsdotgov_at":"2026-03-18T08:55:04Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":6581,"subtype":null,"title":"Approval and Promulgation of Air Quality Implementation Plans; Oklahoma; Regional Haze State Implementation Plan for the Second Implementation Period","toc_doc":"Oklahoma; Regional Haze State Implementation Plan for the Second Implementation Period","toc_subject":"Air Quality State Implementation Plans; Approvals and Promulgations","topics":["Air pollution control","Environmental protection","Incorporation by reference","Intergovernmental relations","Nitrogen dioxide","Ozone","Particulate matter","Reporting and recordkeeping requirements","Sulfur oxides"],"type":"Proposed Rule","volume":91}