Air Plan Approval and Attainment Date Extension; 1997 Annual Fine Particulate Matter Nonattainment Area; San Joaquin Valley, California

The Environmental Protection Agency (EPA) is finalizing approval of a state implementation plan (SIP) revision submitted by the State of California to meet Clean Air Act (CAA or "Act") requirements for the 1997 fine particulate matter (PM<INF>2.5</INF>) national ambient air quality standards (NAAQS or "standards") in the San Joaquin Valley "Serious" nonattainment area. The EPA is also finalizing a one-year extension of the applicable attainment date from December 31, 2023, to December 31, 2024, for the 1997 annual PM<INF>2.5</INF> San Joaquin Valley, California, nonattainment area based on our evaluation of air quality monitoring data and the extension request and supporting information submitted by the State of California.