Data / Federal rules / 2025-07259

Air Plan Approval; Missouri; Removal of Obsolete Rules on Control of NOX Emissions

The Environmental Protection Agency published this proposed rule in the Federal Register on April 29, 2025. Comments closed on May 29, 2025.

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What the agency says

The Environmental Protection Agency (EPA) is proposing approval of a State Implementation Plan (SIP) revision submitted by the Missouri Department of Natural Resources (MoDNR) on November 14, 2018. MoDNR requests that the EPA remove from its SIP two rules related to control of emissions of nitrogen oxides (NO<INF>X</INF>). One of the rules previously applied to electricity generating units (EGUs) and certain non-EGUs in a portion of the state and the other rule previously applied to EGUs throughout the entire state. The EPA has already approved a SIP revision that included provisions to sunset the two rules, and removal of the now-sunsetted rules from the SIP would not have an adverse effect on air quality. The EPA's proposed approval of this rule revision is being done in accordance with the requirements of the Clean Air Act (CAA).

Key facts

Document number: 2025-07259
Type: Proposed rule
Action: Proposed rule
Agency: Environmental Protection Agency
Published: April 29, 2025
Comments due: May 29, 2025
Dates: Comments must be received on or before May 29, 2025.
Docket: EPA-R07-OAR-2025-0138; FRL-12693-01-R7
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Environmental protection; Incorporation by reference; Ozone
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 April 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.