Home / Agencies / EPA / 2026-14260
Proposed Rule

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

Agency
EPA
Document Number
2026-14260
Published
July 15, 2026
Effective Date
-

Abstract

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).

Federal Register Source

This document is published by the Office of the Federal Register, National Archives and Records Administration. Access the full regulatory text, preamble, and docket comments below.

View Full Text on FederalRegister.gov →

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Frequently Asked Questions

What is the 2026-14260 Federal Register document?
Document 2026-14260 is a Proposed Rule published by the Environmental Protection Agency in the Federal Register on July 15, 2026. 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). View the original at https://www.federalregister.gov/documents/2026/07/15/2026-14260/air-plan-approval-missouri-control-of-nox-emissions-from-large-stationary-internal-combustion.
Is document 2026-14260 an economically significant rule?
No. Document 2026-14260 is not classified as economically significant under Executive Order 12866. Economically significant rules require OIRA review and are estimated to have impacts of $100 million or more per year.

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