2010 Sulfur Dioxide National Ambient Air Quality Standards Implementation Actions
Findings of Failure to Submit State Implementation Plans Required for Attainment of the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard
July 31, 2024 - As required by the Clean Air Act, EPA finds that four states failed to submit complete State Implementation Plan (SIP) submissions for areas designated nonattainment for the 2010 1-hour primary National Ambient Air Quality Standard (NAAQS) for sulfur dioxide (SO2). These submissions, known as attainment plans, should outline the actions an area will take to improve air quality and meet the NAAQS. These findings apply to:
- St. Lawrence County, NY;
- Giles County, VA;
- St. Bernard Parish, LA;
- Miami, AZ.
- Findings of Failure to Submit State Implementation Plan Revisions for Nonattainment Areas for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard
- Fact Sheet: Findings of Failure to Submit State Implementation Plans Required for Attainment of the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard (pdf)
March 10, 2016 - EPA finds that 11 states have failed to make State Implementation Plan submittals required under the Clean Air Act for 16 areas that were designated as nonattainment for the 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard in 2013.
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Final Notice (pdf) (4pp, 223 KB)
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Correction Notice (pdf) (3pp, 97 KB)
Additional Regulatory Information
Learn about the final data requirements for air agencies to monitor or model ambient SO2 levels in areas with large sources of SO2 emissions by reading the SO2 Data Requirements Rule rule text, fact sheet and presentation overview.
To learn more about the standards, visit the page for the 2010 Primary National Ambient Air Quality Standards (NAAQS) for Sulfur Dioxide (SO2)
Guidance
Detailed implementation guidance can be found on the 2010 1-Hour Sulfur Dioxide (SO2) Primary National Ambient Air Quality Standards (NAAQS) Implementation Guidance Documents page.