Rule lifecycle · DOCKET:EPA-R07-OAR-2026-4819
Air Plan Approval; Missouri; Control of NOX Emissions From Large Stationary Internal Combustion Engines
Environmental Protection Agency — observed across 2 documents over 78 days. Use the source documents below before deciding whether this affects your business.
In plain English
Missouri has updated its air pollution plan to set tougher limits on diesel emissions from large generators and motors at business sites, and the EPA approved these stronger standards. If your business has large diesel generators, compressors, or pumps running at your location, you should verify you comply with the new rules or budget for equipment upgrades by November 2.
First seen
Jul 15, 2026
Last seen
Oct 1, 2026
Latest stage
Rule
PRORULE → RULE
78d
Effective on
Monday, November 2, 2026
Stage timeline
Proposed·Jul 15, 2026·91 FR 43351
Air Plan Approval; Missouri; Control of NOX Emissions From Large Stationary Internal Combustion Engines
comments close Aug 14, 2026#2026-14260
Final·Oct 1, 2026·91 FR 62320
Air Plan Approval; Missouri; Control of NOX Emissions From Large Stationary Internal Combustion Engines
effective Nov 2, 2026#2026-20096