Data / Federal rules / 2025-10541

Air Plan Approval; Arizona; Maricopa County Air Quality Department; Correction

The Environmental Protection Agency published this final rule in the Federal Register on June 11, 2025. It took effect on June 11, 2025.

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What the agency says

On January 16, 2025, the Environmental Protection Agency (EPA) published a final rule in the Federal Register approving revisions to the Maricopa County Air Quality Department (MCAQD or "County") portion of the Arizona State Implementation Plan (SIP). In that rulemaking, the EPA inadvertently published numbering errors in the regulatory text codifying the approval in the Code of Federal Regulations (CFR). This document corrects the errors in the final rule's regulatory text.

Key facts

Document number: 2025-10541
Type: Final rule
Action: Correcting amendments
Agency: Environmental Protection Agency
Published: June 11, 2025
Takes effect: June 11, 2025
Dates: This action is effective June 11, 2025.
Docket: EPA-R09-OAR-2022-0607; FRL-10024-04-R9
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Environmental protection; Incorporation by reference; Intergovernmental relations; Nitrogen oxides; Ozone; Reporting and recordkeeping requirements; Volatile organic compounds
Pages: 2

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 June 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.