Data / Federal rules / 2025-18569
Utah; Northern Wasatch Front; 2015 8-Hour Ozone Nonattainment Area Boundary Expansion and Applicability of Certain Clean Air Act Requirements
The Environmental Protection Agency published this proposed rule in the Federal Register on September 25, 2025. Comments closed on October 27, 2025.
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What the agency says
The Environmental Protection Agency (EPA) is proposing to approve a request to expand the boundary for the Northern Wasatch Front (NWF) 2015 8-hour ozone national ambient air quality standard (NAAQS) nonattainment area (NAA). The request was submitted by the State of Utah on February 27, 2023. The newly expanded portion of the NWF NAA will have the same classification as the original NWF NAA under the 2015 ozone NAAQS and all applicable Clean Air Act (CAA) requirements will become applicable to the newly designated portion upon the effective date of the final action. The EPA is taking this action pursuant to the CAA.
Key facts
- Document number
- 2025-18569
- Type
- Proposed rule
- Action
- Proposed rule
- Agency
- Environmental Protection Agency
- Published
- September 25, 2025
- Comments due
- October 27, 2025
- Dates
- Written comments must be received on or before October 27, 2025.
- Docket
- EPA-R08-OAR-2025-0001; FRL-12971-01-R8
- Code of Federal Regulations
- 40 CFR 81
- Topics
- Administrative practice and procedure; Air pollution control; Environmental protection; Intergovernmental relations; Nitrogen oxides; Ozone; Reporting and recordkeeping requirements; Volatile organic compounds
- Pages
- 7
Other documents from the Environmental Protection Agency
Everything from the Environmental Protection Agency · Rules on administrative practice and procedure · Rules on air pollution control · Rules on environmental protection · Published in September 2025
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