{"abstract":"In response to a court decision, the Environmental Protection Agency (EPA) is proposing to correct our July 22, 2020 final action erroneously granting a Clean Air Act (CAA or \"Act\") section 188(e) attainment date extension for the 2006 24-hour fine particulate matter (PM<INF>2.5</INF>) national ambient air quality standards (NAAQS or \"standards\") in the San Joaquin Valley from December 31, 2019, to December 31, 2024, and is now proposing to deny California's extension request. The EPA is also proposing to determine that the San Joaquin Valley nonattainment area failed to attain the 2006 24-hour PM<INF>2.5</INF> NAAQS by the December 31, 2019 unextended attainment date. This proposed determination is based upon monitored air quality data from 2017 through 2019. If the EPA finalizes this determination as proposed, the State of California will be required to submit a revision to the California state implementation plan (SIP) that, among other elements, provides for expeditious attainment of the 2006 24-hour PM<INF>2.5</INF> NAAQS and for a five percent annual reduction in emissions of direct PM<INF>2.5</INF> or a PM<INF>2.5</INF> plan precursor pollutant.","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/2026/04/02/2026-06441.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"52","title":40}],"citation":"91 FR 16614","comment_url":"http://www.regulations.gov/commenton/EPA-R09-OAR-2026-1257-0001","comments_close_on":"2026-05-04","correction_of":null,"corrections":[],"dates":"Comments must be received on or before May 4, 2026.","disposition_notes":null,"docket_ids":["EPA-R09-OAR-2026-1257","FRL-13247-01-R9"],"dockets":[{"supporting_documents":[{"title":"D_Notice of Proposed Rulemaking","document_id":"EPA-R09-OAR-2026-1257-0006"},{"title":"C_Additional Documents for Proposed Rulemaking","document_id":"EPA-R09-OAR-2026-1257-0005"},{"title":"B_State Correspondence and Data Analysis Documents","document_id":"EPA-R09-OAR-2026-1257-0004"},{"title":"A_U.S. EPA Rulemakings, Guidance Documents, Correspondence, Data Analysis Documents, and Determinations","document_id":"EPA-R09-OAR-2026-1257-0003"},{"title":"Docket Index_SJV 2006 PM2.5 FFTA_Proposal","document_id":"EPA-R09-OAR-2026-1257-0002"}],"agency_name":"EPA","documents":[{"comment_count":0,"comment_start_date":"2026-04-02","updated_at":"2026-04-02T10:57:04.764-04:00","comment_url":"https://www.regulations.gov/commenton/EPA-R09-OAR-2026-1257-0001","allow_late_comments":false,"id":"EPA-R09-OAR-2026-1257-0001","comment_end_date":"2026-05-05","regulations_dot_gov_open_for_comment":true}],"supporting_documents_count":5,"id":"EPA-R09-OAR-2026-1257","title":"Error Correction and Finding of Failure to Attain the 2006 24-Hour PM2.5 Standards; California; San Joaquin Valley"}],"document_number":"2026-06441","effective_on":null,"end_page":16621,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/04/02/2026-06441.xml","html_url":"https://www.federalregister.gov/documents/2026/04/02/2026-06441/finding-of-failure-to-attain-the-2006-24-hour-pm25-standards-california-san-joaquin-valley-error","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-06441?publication_date=2026-04-02","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-04-02/2026-06441/mods.xml","not_received_for_publication":null,"page_length":8,"page_views":{"count":188,"last_updated":"2026-04-17 04:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-04-02/pdf/2026-06441.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-06441.pdf?1775047521","publication_date":"2026-04-02","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/04/02/2026-06441.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"supporting_documents":[{"title":"D_Notice of Proposed Rulemaking","document_id":"EPA-R09-OAR-2026-1257-0006"},{"title":"C_Additional Documents for Proposed Rulemaking","document_id":"EPA-R09-OAR-2026-1257-0005"},{"title":"B_State Correspondence and Data Analysis Documents","document_id":"EPA-R09-OAR-2026-1257-0004"},{"title":"A_U.S. EPA Rulemakings, Guidance Documents, Correspondence, Data Analysis Documents, and Determinations","document_id":"EPA-R09-OAR-2026-1257-0003"},{"title":"Docket Index_SJV 2006 PM2.5 FFTA_Proposal","document_id":"EPA-R09-OAR-2026-1257-0002"}],"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-2026-1257","supporting_documents_count":5,"docket_id":"EPA-R09-OAR-2026-1257","document_id":"EPA-R09-OAR-2026-1257-0001","regulation_id_number":null,"title":"Error Correction and Finding of Failure to Attain the 2006 24-Hour PM2.5 Standards; California; San Joaquin Valley","checked_regulationsdotgov_at":"2026-04-03T16:55:04Z"},"regulations_dot_gov_url":"http://www.regulations.gov/commenton/EPA-R09-OAR-2026-1257-0001","significant":null,"signing_date":null,"start_page":16614,"subtype":null,"title":"Finding of Failure To Attain the 2006 24-Hour PM2.5 Standards; California; San Joaquin Valley; Error Correction","toc_doc":"Finding of Failure to Attain the 2006 24-Hour PM2.5 Standards; California; San Joaquin Valley; Error Correction","toc_subject":"Air Quality State Implementation Plans; Approvals and Promulgations","topics":["Air pollution control","Ammonia","Environmental protection","Incorporation by reference","Intergovernmental relations","Nitrogen oxides","Reporting and recordkeeping requirements","Sulfur oxides","Volatile organic compounds"],"type":"Proposed Rule","volume":91}