Proposed Approval of Finding of South Coast Failure to Attain the 2006 24-Hour PM2.5 National Ambient Air Quality Standards

On July 10, 2020, the U.S. Environmental Protection Agency (EPA) published a proposed rule on the Federal Register to determine that the Los Angeles-South Coast Air Basin nonattainment area failed to attain the 2006 24-hour PM_2.5 NAAQS by the December 31, 2019 “Serious” area attainment date. If EPA finalizes this determination as proposed, California will be required to submit a revision to the California SIP that provides for expeditious attainment within the regulation’s time limits and provides for a five percent annual reduction in the emissions of direct PM_2.5 or a PM_2.5 plan precursor pollutant. For more information, view the Federal Register Notice.