SO2 NAAQS Area Designations
Current understanding
To be populated as evidence accumulates.
Evidence log
- 2026-10-29 — Air Plan Approval and Air Quality Designation; TN; Attainment Plan and Redesignation of the Sullivan County Nonattainment Area for the 2010 1-Hour Primary SO2 NAAQS: 2026 — EPA proposed to find Sullivan County, Tennessee attainment with the 2010 1-hour primary SO2 NAAQS, approve the state’s attainment plan and facility emission limits, and redesignate the area from nonattainment to attainment. (novelty: 2)
- 2026-07-30 — Air Plan Approval; Pennsylvania; Redesignation of the Warren County Nonattainment Area to Attainment and Approval of the Area’s Maintenance Plan for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard: 2025 — EPA proposed to redesignate Warren County, Pennsylvania from nonattainment to attainment for the 2010 1-hour primary SO2 NAAQS, approve the area’s maintenance plan, and correct erroneous source-specific SIP requirements for United Refining Company. (novelty: 2) (novelty: 2)
Open questions
Related
Contributing findings
Air Plan Approval and Air Quality Designation; TN; Attainment Plan and Redesignation of the Sullivan County Nonattainment Area for the 2010 1-Hour Primary SO2 NAAQS
29-oct-2026
novelty 2
per-area 2
introduces
Air Plan Approval; Pennsylvania; Redesignation of the Warren County Nonattainment Area to Attainment and Approval of the Area's Maintenance Plan for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard
30-jul-2026
novelty 2
per-area 2
strengthens