EPA Greenlights Missouri's Updated Air Pollution Permit Rules
Published Date: 4/23/2026
Rule
Summary
The EPA just gave a thumbs-up to Missouri’s updated rules for getting construction permits for air pollution sources. This means businesses building or changing stationary or portable air pollution equipment will see updated fees and clearer rules starting May 26, 2026. These changes keep Missouri’s air clean without messing up any federal air quality goals.
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Analyzed Economic Effects
3 provisions identified: 0 benefits, 2 costs, 1 mixed.
Construction Permit Fee Updates
If you own or operate a facility in Missouri that builds or modifies stationary or portable air pollution equipment, Missouri updated the fees for applying for and receiving construction permits. The state set the rule effective February 28, 2025, and EPA approval makes the revised fees federally effective on May 26, 2026.
State Rule Now Federally Enforceable
The EPA incorporated Missouri rule 10 CSR 10-6.060 into the federal State Implementation Plan (SIP); the revised rule is fully federally enforceable under Clean Air Act sections 110 and 113 as of May 26, 2026. The state effective date for the rule is February 28, 2025.
Voluntary Permit Option Removed
Missouri removed subsection (1)(B) that provided the ability for facilities to apply for and receive voluntary permits; that subsection was never approved into the SIP. The State made this change effective February 28, 2025, and the EPA approved the revision with federal effect on May 26, 2026.
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