Finding of Failure To Attain the 2006 24-Hour PM2.5 Standards; California; San Joaquin Valley; Error Correction

Document 2026-11731 is a Final Rule published by the Environmental Protection Agency in the Federal Register on June 11, 2026, with an effective date of July 13, 2026. In response to a court decision, the Environmental Protection Agency (EPA) is correcting our July 22, 2020 final action erroneously granting a Clean Air Act (CAA) 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 denying California's extension request. The EPA is also finalizing our determination 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 determination is based on monitored air quality data from 2017 through 2019. As a result of this final determination, 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. View the original at https://www.federalregister.gov/documents/2026/06/11/2026-11731/finding-of-failure-to-attain-the-2006-24-hour-pm25-standards-california-san-joaquin-valley-error.

No. Document 2026-11731 is not classified as economically significant under Executive Order 12866. Economically significant rules require OIRA review and are estimated to have impacts of $100 million or more per year.