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

Open for public comment until Nov. 30, 2026. Comment on Regulations.gov

What it does

The U.S. Environmental Protection Agency (EPA or Agency) is proposing to approve the State of Tennessee's attainment plan for the Sullivan County Nonattainment Area (Sullivan County Area or Area) for the 2010 Sulfur Dioxide (SO<INF>2</INF>) National Ambient Air Quality Standards (NAAQS). Additionally, the EPA is proposing to determine that the Area has attained the 2010 SO<INF>2</INF> NAAQS and to approve Tennessee's maintenance plan for continued attainment. With these approvals, the EPA is proposing to approve Tennessee's comprehensive source-specific SO<INF>2</INF> permitted limits for two facilities in the Area, other control measures, and provisions for Reasonably Available Control Measures (RACM) and Reasonably Available Control Technology (RACT), reasonable further progress (RFP), a modeling demonstration of SO<INF>2</INF> attainment and maintenance, and to approve Tennessee's request to redesignate the Area from nonattainment to attainment of the 2010 SO<INF>2</INF> NAAQS. The EPA is taking these actions in accordance with the Clean Air Act (CAA or Act).

The Environmental Protection Agency's summary, as published in the Federal Register.

What it would change

2 parts of Title 40 of the Code of Federal Regulations:

40 CFR 52, 40 CFR 81

What happens next and when

Comments must be received on or before November 30, 2026.

The agency's dates, word for word.

Check it yourself

• The document in the Federal Register
• Docket EPA-R04-OAR-2026-0034 on Regulations.gov
• Title 40 on eCFR

The record as published

Source: the Federal Register (public domain). The document in the Federal Register