Data / Federal rules / 2025-19638

Air Plan Approval; Arizona; Interstate Transport 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 October 23, 2025. Comments closed on November 24, 2025.

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What the agency says

The Clean Air Act (CAA) requires each state implementation plan (SIP) to contain adequate provisions prohibiting emissions that will significantly contribute to nonattainment or interfere with maintenance of air quality in other states. The State of Arizona submitted SIP revisions to the Environmental Protection Agency (EPA) to address these requirements for the 2012 fine particulate (PM<INF>2.5</INF>) national ambient air quality standards (NAAQS). The EPA is proposing to approve Arizona's SIP submission as meeting the requirement that the Arizona SIP contains adequate provisions to prohibit emissions activity, within the State, from emitting air pollutants in amounts that will significantly contribute to nonattainment or interfere with maintenance of the 2012 PM<INF>2.5</INF> NAAQS in any other state.

Key facts

Document number: 2025-19638
Type: Proposed rule
Action: Proposed rule
Agency: Environmental Protection Agency
Published: October 23, 2025
Comments due: November 24, 2025
Dates: Comments must be received on or before November 24, 2025.
Docket: EPA-R09-OAR-2025-0191; FRL-12978-01-R9
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Environmental protection; Incorporation by reference; Intergovernmental relations; Nitrogen dioxide; Ozone; Particulate matter; Reporting and recordkeeping requirements; Volatile organic compounds
Pages: 3

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on air pollution control · Rules on environmental protection · Rules on incorporation by reference · Published in October 2025

Read from the Federal Register API, last updated 2026-10-24. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.