Proposed rule · 2025-13337

Air Plan Approval; State of Utah; Utah PM2.5 State Implementation Plan Revisions

The Environmental Protection Agency (EPA) is proposing to approve, through parallel processing, a State Implementation Plan (SIP) submission from the State of Utah with revisions to Utah Administrative Code (UAC), Utah State SIP, and the best available control measures/ best available control technologies (BACM/BACT) determinations for five facilities found in the Salt Lake City, Utah nonattainment area (NAA) for the 2006 24-hour fine particulate matter with an aerodynamic diameter less than or equal to a nominal 2.5 microns (PM<INF>2.5</INF>) National Ambient Air Quality Standard (NAAQS) (State of Utah draft dated May 20, 2025). The EPA is taking this action pursuant to the Clean Air Act (CAA or the Act).