Data / Federal rules / 2026-16083
Partial Approval and Partial Disapproval of Air Quality State Implementation Plans; Arizona; Prevention of Significant Deterioration Infrastructure Requirements for the 2012 Fine Particulate Matter National Ambient Air Quality Standard
The Environmental Protection Agency published this proposed rule in the Federal Register on August 6, 2026. It took effect on September 8, 2026. Comments closed on June 13, 2024.
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What the agency says
The Environmental Protection Agency (EPA) is proposing to partially approve and partially disapprove a revision to the Arizona State implementation plan (SIP) as meeting the requirements of the Clean Air Act (CAA) for the implementation, maintenance, and enforcement of the 2012 fine particulate matter (PM<INF>2.5</INF>) national ambient air quality standard (NAAQS or "standards"). The EPA is proposing to approve the portions of Arizona's submission addressing prevention of significant deterioration (PSD) requirements in the permitting jurisdictions of the Arizona Department of Environmental Quality (ADEQ), Maricopa County Air Quality Department (MCAQD), and Pinal County Air Quality Control District (PCAQCD). The EPA is proposing to disapprove the portions of the Arizona submission addressing PSD requirements in the Pima County Department of Environmental Quality (PDEQ) permitting jurisdiction.
Key facts
- Document number
- 2026-16083
- Type
- Proposed rule
- Action
- Proposed rule; withdrawal
- Agency
- Environmental Protection Agency
- Published
- August 6, 2026
- Takes effect
- September 8, 2026
- Comments due
- June 13, 2024
- Dates
- Comments must be received by September 8, 2026. As of July 21, 2026, the proposed rule published on June 13, 2024, at 89 FR 50245, is withdrawn insofar as it related to the PSD-related requirements of CAA sections 110(a)(2)(C), 110(a)(2)(D)(i)(II), 110(a)(2)(D)(ii), and 110(a)(2)(J).
- Docket
- EPA-R09-OAR-2026-3797; FRL-13389-01-R9
- Code of Federal Regulations
- 40 CFR 52
- Topics
- Air pollution control; Environmental protection; Incorporation by reference; Intergovernmental relations; Nitrogen dioxide; Particulate matter; Reporting and recordkeeping requirements; Volatile organic compounds
- Pages
- 5
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