11 Sep 2025

🌫️EPA Proposes Approval of Arizona's PM10 Air Quality Plan

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

Summary

The Environmental Protection Agency (EPA) is proposing to fully approve the Arizona Department of Environmental Quality's (ADEQ or "State") State Implementation Plan (SIP) submittal under the Clean Air Act (CAA or "the Act") that addresses Nonattainment New Source Review (NNSR) permitting of precursor emissions for the 1987 National Ambient Air Quality Standards (NAAQS or "standard") for particulate matter with a diameter of 10 micrometers or less (PM<INF>10</INF>) in the West Pinal PM<INF>10</INF> nonattainment area. We are taking comments on this proposal and plan to follow with a final action.

Agencies

  • Environmental Protection Agency

Business Impact ?

$$ - Med

The proposed rule involves the EPA's approval of Arizona's implementation plan addressing air quality standards and permitting requirements for PM10 emissions, which directly affects compliance and regulatory obligations for businesses in the area. Companies operating in the West Pinal County may need to adjust operations to comply with new air quality regulations.

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