Final rule · 2025-22582

Approval of Air Quality Implementation Plans; Arizona; Arizona Department of Environmental Quality; Stationary Source Permits; West Pinal County; PM10

The Environmental Protection Agency (EPA) is taking final action to fully approve the Arizona Department of Environmental Quality's (ADEQ or "State") portion of the Arizona State Implementation Plan (SIP) under the Clean Air Act (CAA or "the Act") that addresses Nonattainment New Source Review (NNSR) permitting for precursor emissions from major stationary sources for purposes of the 1987 PM<INF>10</INF> National Ambient Air Quality Standards (NAAQS or standard) in the West Pinal PM<INF>10</INF> nonattainment area.