Data / Federal rules / 2026-17503
Air Plan Approval; Mississippi; 2010 1-Hour SO2 NAAQS Transport Infrastructure
The Environmental Protection Agency published this proposed rule in the Federal Register on August 27, 2026. Comments closed on September 17, 2026.
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What the agency says
Pursuant to the Federal Clean Air Act (CAA or the Act), the U.S. Environmental Protection Agency (EPA or Agency) is proposing to approve a State Implementation Plan (SIP) revision submitted by the State of Mississippi, through the Mississippi Department of Environmental Quality (MDEQ), on January 27, 2022, for the purpose of complying with the "good neighbor" provision of the CAA for the 2010 1-hour sulfur dioxide (SO<INF>2</INF>) primary National Ambient Air Quality Standard (NAAQS). The good neighbor provision requires each State's implementation plan to contain adequate provisions prohibiting the interstate transport of air pollution in amounts that will contribute significantly to nonattainment, or interfere with maintenance, of a NAAQS in any other State. In this proposed rulemaking, the EPA is proposing to determine that Mississippi will not contribute significantly to nonattainment or interfere with maintenance of the 2010 1-hour SO<INF>2</INF> primary NAAQS in any other State. Therefore, the EPA is proposing to approve the January 27, 2022, SIP revision as meeting the requirements of the good neighbor provision for the 2010 1-hour SO<INF>2</INF> primary NAAQS.
Key facts
- Document number
- 2026-17503
- Type
- Proposed rule
- Action
- Proposed rule
- Agency
- Environmental Protection Agency
- Published
- August 27, 2026
- Comments due
- September 17, 2026
- Dates
- Comments must be received on or before September 17, 2026.
- Docket
- EPA-R04-OAR-2023-0227; FRL-13502-01-R4
- Code of Federal Regulations
- 40 CFR 52
- Topics
- Air pollution control; Carbon monoxide; Environmental protection; Incorporation by reference; Intergovernmental relations; Lead; Nitrogen dioxide; Ozone; Particulate matter; Reporting and recordkeeping requirements; Sulfur oxides; Volatile organic compounds
- Pages
- 8
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