{"abstract":"The Environmental Protection Agency (EPA) is taking final action to determine that the Riverside County (Coachella Valley), CA 1997 ozone \"Extreme\" nonattainment area attained the revoked 1997 ozone national ambient air quality standards (NAAQS) by its June 15, 2025 attainment date. This determination is based on quality-assured and certified ambient air quality monitoring data from 2022 through 2024.","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/2026/08/13/2026-16511.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"52","title":40}],"citation":"91 FR 52241","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This rule is effective September 14, 2026.","disposition_notes":null,"docket_ids":["EPA-R09-OAR-2025-3127","FRL-13098-02-R9"],"dockets":[{"supporting_documents":[{"title":"VI.D. O3_DesignValues_2020_2022_FINAL_05_22_23","document_id":"EPA-R09-OAR-2025-3127-0054"},{"title":"VI.B. Design Value Report All Monitors_AMP480_2294814","document_id":"EPA-R09-OAR-2025-3127-0052"},{"title":"VI.A. Meeting Notes EPA_CBCI_3_30_ 2026","document_id":"EPA-R09-OAR-2025-3127-0050"},{"title":"Docket Index EPA-R09-OAR-2025-3127 Proposed Rule","document_id":"EPA-R09-OAR-2025-3127-0047"},{"title":"III.A.1 2022_SouthCoast_ANP","document_id":"EPA-R09-OAR-2025-3127-0042"},{"title":"II.D.8. Coachella SIP Completeness Checklist","document_id":"EPA-R09-OAR-2025-3127-0036"},{"title":"III.D.1 20250606_South Coast AQMD_TSA Report Cover Letter","document_id":"EPA-R09-OAR-2025-3127-0034"},{"title":"II.D.5. Governing Board Package for the Coachella Valley Extreme Area Plan","document_id":"EPA-R09-OAR-2025-3127-0033"},{"title":"II.C.12. Rule 317.1 District Submittal Letter","document_id":"EPA-R09-OAR-2025-3127-0028"},{"title":"III.C.2. EPA Letter on ANP_2024_SCAQMD_20241029","document_id":"EPA-R09-OAR-2025-3127-0026"}],"agency_name":"EPA","documents":[{"comment_count":0,"comment_start_date":"2026-08-13","updated_at":"2026-08-13T09:56:39.506-04:00","comment_url":"https://www.regulations.gov/commenton/EPA-R09-OAR-2025-3127-0055","allow_late_comments":false,"id":"EPA-R09-OAR-2025-3127-0055","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":52,"id":"EPA-R09-OAR-2025-3127","title":"Determination of Attainment by the Attainment Date; 1997 Ozone Standards; California; Coachella Valley"}],"document_number":"2026-16511","effective_on":"2026-09-14","end_page":52243,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/08/13/2026-16511.xml","html_url":"https://www.federalregister.gov/documents/2026/08/13/2026-16511/determination-of-attainment-by-the-attainment-date-1997-ozone-standards-california-coachella-valley","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-16511?publication_date=2026-08-13","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-08-13/2026-16511/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":227,"last_updated":"2026-10-24 14:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-08-13/pdf/2026-16511.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-16511.pdf?1786538715","publication_date":"2026-08-13","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/08/13/2026-16511.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"supporting_documents":[{"title":"VI.D. O3_DesignValues_2020_2022_FINAL_05_22_23","document_id":"EPA-R09-OAR-2025-3127-0054"},{"title":"VI.B. Design Value Report All Monitors_AMP480_2294814","document_id":"EPA-R09-OAR-2025-3127-0052"},{"title":"VI.A. Meeting Notes EPA_CBCI_3_30_ 2026","document_id":"EPA-R09-OAR-2025-3127-0050"},{"title":"Docket Index EPA-R09-OAR-2025-3127 Proposed Rule","document_id":"EPA-R09-OAR-2025-3127-0047"},{"title":"III.A.1 2022_SouthCoast_ANP","document_id":"EPA-R09-OAR-2025-3127-0042"},{"title":"II.D.8. Coachella SIP Completeness Checklist","document_id":"EPA-R09-OAR-2025-3127-0036"},{"title":"III.D.1 20250606_South Coast AQMD_TSA Report Cover Letter","document_id":"EPA-R09-OAR-2025-3127-0034"},{"title":"II.D.5. Governing Board Package for the Coachella Valley Extreme Area Plan","document_id":"EPA-R09-OAR-2025-3127-0033"},{"title":"II.C.12. Rule 317.1 District Submittal Letter","document_id":"EPA-R09-OAR-2025-3127-0028"},{"title":"III.C.2. EPA Letter on ANP_2024_SCAQMD_20241029","document_id":"EPA-R09-OAR-2025-3127-0026"}],"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-2025-3127","supporting_documents_count":52,"docket_id":"EPA-R09-OAR-2025-3127","document_id":"EPA-R09-OAR-2025-3127-0055","regulation_id_number":null,"title":"Determination of Attainment by the Attainment Date; 1997 Ozone Standards; California; Coachella Valley","checked_regulationsdotgov_at":"2026-08-14T16:55:11Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":52241,"subtype":null,"title":"Determination of Attainment by the Attainment Date; 1997 Ozone Standards; California; Coachella Valley","toc_doc":"California; Determination of Attainment by the Attainment Date; 1997 Ozone Standards","toc_subject":"Air Quality State Implementation Plans; Approvals and Promulgations","topics":["Air pollution control","Environmental protection","Incorporation by reference","Intergovernmental relations","Nitrogen oxides","Ozone","Reporting and recordkeeping requirements","Volatile organic compounds"],"type":"Rule","volume":91}