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EPA approves Missouri rule narrowing construction permit exemptions for emergency generators and lead

By LexCircuit Desk · · AI-drafted, human-reviewed

EPA approved Missouri's revised construction permit exemptions rule, 10 CSR 10-6.061, into the state's Clean Air Act implementation plan, effective November 9, 2026. Sources must now meet added criteria to use the emergency generator exemption, which is narrower for sites with several generators, and the lead exemption threshold is tightened; EPA said the revision adds no new exemptions.

Text (Federal Register) →

Key points

  • Missouri rule 10 CSR 10-6.061 lists projects exempt from the permit-to-construct requirement in 10 CSR 10-6.060.Federal Register
  • Sources must meet added criteria to claim the emergency generator exemption, which is narrower for sites with more than one generator.Federal Register
  • The revision tightens the lead compound exemption threshold and keeps lead emissions within the 876 pounds-per-year cap.Federal Register
  • Owners must still keep records showing actual emissions stay below the thresholds; EPA left two subsections out of its approval.Federal Register
  • Final rule 91 FR 64295 (FR Doc. 2026-20634) takes effect November 9, 2026; Missouri submitted the revision February 10, 2026.Federal Register

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RegulationU.S.Mo.EPA Final Rule: Missouri Construction Permit Exemptions SIP (2026)EnvironmentalRegulatoryFor practitionersFor governance