Data / Federal rules / 2024-31028

Air Plan Revisions; Arizona; Maricopa County Air Quality Department

The Environmental Protection Agency published this final rule in the Federal Register on January 10, 2025. It took effect on February 10, 2025.

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What the agency says

The Environmental Protection Agency (EPA) is finalizing a limited approval and limited disapproval of revisions to the Maricopa County Air Quality Department (MCAQD or "County") portion of the Arizona State Implementation Plan (SIP). These revisions concern emissions of volatile organic compounds (VOCs) from loading of organic liquids and gasoline. Under the authority of the Clean Air Act (CAA or "Act"), this action simultaneously approves local rules that regulate these emission sources and directs Arizona to correct rule deficiencies. We are also finalizing a disapproval of MCAQD's reasonably available control technology (RACT) demonstration for the source categories associated with these rules for the 2008 8-hour ozone national ambient air quality standard (NAAQS) in the Phoenix-Mesa ozone nonattainment area.

Key facts

Document number: 2024-31028
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: January 10, 2025
Takes effect: February 10, 2025
Dates: This rule is effective February 10, 2025.
Docket: EPA-R09-OAR-2024-0349; FRL-12130-02-R9
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Environmental protection; Incorporation by reference; Intergovernmental relations; Ozone; Reporting and recordkeeping requirements; Volatile organic compounds
Pages: 5

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 January 2025

Read from the Federal Register API, last updated 2026-10-23. 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.