Contingency Measure Plan for 1997 Ozone Standard

The South Coast Air Basin is classified as an "extreme" nonattainment area for the 1997 8-hour ozone NAAQS, with an attainment date of June 15, 2024. As required by the federal Clean Air Act, South Coast AQMD adopted a Contingency Measure Plan for the 1997 ozone standard on December 6, 2019 and subsequently submitted to U.S. EPA. On February 2, 2024, U.S. EPA proposed disapproval of that plan. U.S. EPA is accepting comments on their proposed action through April 3, 2023 (link).

**NEW** South Coast AQMD's Comment Letter to U.S. EPA (dated March 27, 2024)

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