Data / Federal rules / 2025-00336

State Implementation Plan Submittal Deadlines and Implementation Requirements for Reclassified Nonattainment Areas Under the Ozone National Ambient Air Quality Standards

The Environmental Protection Agency published this final rule in the Federal Register on January 17, 2025. It took effect on February 18, 2025.

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What the agency says

The Environmental Protection Agency (EPA) is finalizing deadlines for submission of state implementation plan (SIP) revisions and implementation of the relevant control requirements that will apply for nonattainment areas reclassified as Moderate, Serious, and Severe under the current and any future ozone National Ambient Air Quality Standards (NAAQS) as a result of either failing to attain the standard by the applicable classification attainment date or the EPA granting a voluntary reclassification request. This final rule articulates the implementation requirements and timeframes that will apply for all such areas once reclassified. The EPA is also finalizing regulatory revisions to codify its existing interpretation that following reclassification, a state is no longer required to submit SIP revisions addressing certain, but not all, requirements related to the prior classification level for an ozone nonattainment area.

Key facts

Document number: 2025-00336
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: January 17, 2025
Takes effect: February 18, 2025
Dates: This rule is effective on February 18, 2025.
Docket: EPA-HQ-OAR-2024-0333; FRL-11817-02-OAR
Regulation ID (RIN): 2060-AW25
Code of Federal Regulations: 40 CFR 51
Topics: Administrative practice and procedure; Air pollution control; Environmental protection; Intergovernmental relations; Nitrogen oxides; Ozone; Reporting and recordkeeping requirements; Volatile organic compounds
Pages: 28

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on administrative practice and procedure · Rules on air pollution control · Rules on environmental protection · 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.