Data / Federal rules / 2025-18568

Air Plan Approval; Missouri; Definitions and Common Reference Tables

The Environmental Protection Agency published this final rule in the Federal Register on September 25, 2025. It took effect on October 27, 2025.

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What the agency says

The Environmental Protection Agency (EPA) is taking final action to approve revisions to the State Implementation Plan (SIP) for the State of Missouri related to Definitions and Common Reference Tables used in Missouri rules. EPA has also previously approved this rule as part of the air planning and permitting program. Some of the definitions are associated with those programs, even though many of the definitions pertain only to the SIP. These revisions do not impact the stringency of the SIP or have an adverse effect on air quality. The EPA's final approval of this rule revision is being done in accordance with the requirements of the Clean Air Act (CAA).

Key facts

Document number: 2025-18568
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: September 25, 2025
Takes effect: October 27, 2025
Dates: This final rule is effective on October 27, 2025.
Docket: EPA-R07-OAR-2025-0289; FRL-12821-02-R7
Code of Federal Regulations: 40 CFR 52; 40 CFR 62; 40 CFR 70
Topics: Administrative practice and procedure; Air pollution control; Carbon monoxide; Environmental protection; Incorporation by reference; Intergovernmental relations; Lead; Nitrogen dioxide; Ozone; Particulate matter; Reporting and recordkeeping requirements; Sulfur oxides; Volatile organic compounds
Pages: 3

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 carbon monoxide · Published in September 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.