Data / Federal rules / 2026-14260

Air Plan Approval; Missouri; Control of NOX Emissions From Large Stationary Internal Combustion Engines

The Environmental Protection Agency published this proposed rule in the Federal Register on July 15, 2026. Comments closed on August 14, 2026.

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What the agency says

The Environmental Protection Agency (EPA) is proposing to approve revisions to the Missouri State Implementation Plan (SIP) related to Control of Nitrogen Oxide (NO<INF>X</INF>) Emissions From Large Stationary Internal Combustion Engines. The revisions reformat and revise reporting, recordkeeping, and compliance requirements; incorporate other state rules by reference; add definitions specific to the rule; revise unnecessarily restrictive or duplicative language; and make administrative wording changes. The revisions also add an exemption for certain spark-ignited internal combustion engines. The EPA's proposed approval is pursuant to, and consistent with, the requirements of the Clean Air Act (CAA).

Key facts

Document number: 2026-14260
Type: Proposed rule
Action: Proposed rule
Agency: Environmental Protection Agency
Published: July 15, 2026
Comments due: August 14, 2026
Dates: Comments must be received on or before August 14, 2026.
Docket: EPA-R07-OAR-2026-4819; FRL-13460-01-R7
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
Pages: 4

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 July 2026

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.