SO2 Nonattainment

EPA's finding of failure of air quality in St Bernard Parish to attain the one-hour health standard for sulfur dioxide & response to public comments 

Effective November 4, 2022, the United States Environmental Protections Agency (EPA) has determined that the St. Bernard Parish nonattainment area failed to attain the 2010 1-hour primary sulfur dioxide (SO₂) national ambient air quality standards (NAAQS) by the applicable attainment date of October 4, 2018. This determination triggers the requirements of the Clean Air Act (CAA) section 179(d) for the State of Louisiana to submit a revision to the Louisiana State Implementation Plan (SIP) for the St. Bernard Parish nonattainment area to the EPA by October 5, 2023. The SIP revision must, among other elements, provide for attainment of the 1-hour primary SO₂ NAAQS in the St. Bernard Parish SO₂ nonattainment area as expeditiously as practicable but no later than October 5, 2027... and such additional measures as the EPA Administrator may reasonably prescribe that can be feasibly implemented in the area in light of technological achievability, costs, and any non-air quality and other air quality-related health and environmental impacts.

https://www.federalregister.gov/documents/2022/10/05/2022-21249/finding-of-failure-to-attain-the-primary-2010-one-hour-sulfur-dioxide-standard-for-the-st-bernard

For more information on Sulfur Dioxide in St Bernard Parish and background information on the ambient air quality standards for SO₂  https://www.regulations.gov/comment/EPA-R06-OAR-2017-0558-0024