Missouri's Boiler Pollution Rules Get a Dull EPA Stamp of Approval
Published Date: 4/9/2026
Rule
Summary
The EPA is approving some small but important updates to Missouri’s rules on controlling sulfur pollution from big boilers. These changes clean up old references and fix administrative details, helping keep the air cleaner without adding new costs. The updated rules kick in on June 8, 2026, unless someone speaks up by May 11, 2026.
Analyzed Economic Effects
2 provisions identified: 2 benefits, 0 costs, 0 mixed.
Missouri Boiler SO2 Rule Federally Enforceable
The EPA approved revisions to Missouri's rule 10 CSR 10-5.570 for controlling sulfur dioxide (SO2) from stationary boilers and incorporated the revised rule into the Federal SIP; the revisions become federally enforceable on June 8, 2026. The changes are administrative (for example, fixing abbreviations and removing duplicate citations) and are approved as not adding new costs.
No Significant Small-Business Costs
The EPA certified that this SIP approval does not have a significant economic impact on a substantial number of small entities under the Regulatory Flexibility Act. The action also states it does not impose information collection burdens or unfunded mandates.
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