Air Plan Approval; Missouri; Control of NOX Emissions From Large Stationary Internal Combustion Engines
EPA proposes to approve Missouri SIP revisions controlling NOX emissions from large stationary internal combustion engines.
Aforeworn detected this change in the Environmental & Emissions Compliance (EPA) space on July 29, 2026 and published this briefing so affected operators are forewarned rather than caught off guard. It is rated Medium urgency. Owners/operators of large stationary internal combustion engines in Missouri subject to NOX emission limits. should confirm how it applies to their specific situation before acting. There is a time constraint attached: Comments due by August 14, 2026 (30 days after publication on July 15, 2026).. Acting after that point can mean penalties, a lapsed licence, or lost eligibility — exactly the kind of surprise Aforeworn exists to prevent. Aforeworn monitors Environmental & Emissions Compliance (EPA) continuously and turns every detected change into a plain-English briefing like this one, so you always know first. Forewarned is forearmed.
What changed
Missouri's SIP revisions for NOX control from large stationary engines are proposed for EPA approval, which would make state rules federally enforceable.
Who it affects
Owners/operators of large stationary internal combustion engines in Missouri subject to NOX emission limits.
What you must do
Review the proposed SIP revisions and submit comments to EPA by the comment deadline if desired.
Deadline
Comments due by August 14, 2026 (30 days after publication on July 15, 2026).
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