25 Sep 2025

🌫️Proposed Expansion of Northern Wasatch Front Ozone Nonattainment Area

Utah; Northern Wasatch Front; 2015 8-Hour Ozone Nonattainment Area Boundary Expansion and Applicability of Certain Clean Air Act Requirements

Summary

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.

Agencies

  • Environmental Protection Agency

Business Impact ?

$$$ - High

The proposed rule expands the ozone nonattainment area, thereby subjecting businesses in the newly included regions to stricter emissions regulations under the Clean Air Act. Notably, major sources like US Magnesium will require new permits and compliance assessments, directly impacting operational costs and regulatory compliance efforts.

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