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AirPermitHub

MO · EPA Region 7

Missouri Air Permits

Missouri DNR issues air permits statewide (EPA's Missouri page lists no local permitting agencies and no federally recognized tribes). Construction permits under 10 CSR 10-6.060 are chosen by existing and project potential emissions: de minimis, minor, general, permits-by-rule, portable relocation, temporary/pilot, major NSR (nonattainment), PSD, and major HAP permits. Exemptions are in 10 CSR 10-6.061. Operating permits under 10 CSR 10-6.065 are Intermediate (synthetic minor) or Part 70.
Verified against agency sourceLast reviewed 2026-10-25

Air permits & authorizations

  • Construction permit exemptions

    Exemption

    Activities determined to be insignificant sources are exempt from construction permitting.

    10 CSR 10-6.061Official page

  • Permits-by-Rule

    Permit by Rule

    For printing, crematories and animal incinerators, surface coating, and livestock markets, in place of a de minimis or minor permit; can be issued within seven days of a complete application.

    Official page

  • General construction permits

    General Permit

    Filing fee $700 (effective Jan. 1, 2026).

    10 CSR 10-6.060Official page

  • De minimis and minor construction permits

    Minor NSR

    For projects below major thresholds. Minor permit filing fee $300 plus $100/hour processing. Portable relocation and temporary/pilot permits also available.

    10 CSR 10-6.060Official page

  • Intermediate Operating Permit

    State Operating

    For installations accepting federally enforceable limits to stay below major source levels; five-year term; apply within 90 days after operation begins.

    10 CSR 10-6.065Official page

Major NSR (PSD & nonattainment)

  • Major NSR (nonattainment)

    Nonattainment NSR

    Major construction permit for nonattainment areas; $6,000 filing fee. EPA reclassified the Missouri portion of the St. Louis area to Serious for the 2015 ozone standard, but the Eighth Circuit stayed that rule on June 6, 2025, so Moderate requirements remain while the stay is in effect.

    10 CSR 10-6.060Official page

  • PSD

    PSD

    Major construction permit for attainment areas; $6,000 filing fee plus processing. PAL permits available.

    10 CSR 10-6.060Official page

Title V operating permits

  • Part 70 Operating Permit

    Title V

    For installations at or above major source levels; five-year term; apply within 12 months after operation begins; renew 6 to 18 months before expiration.

    10 CSR 10-6.065Official page

Oil & Gas

DNR's construction and operating permit pages list no oil-and-gas-specific air permit.

    Oil & Gas industry hub

    State air regulations

    Forms

    Guidance

    Compliance

    State compliance obligations (reporting, emissions inventory, testing) are being indexed. Use the Compliance dashboard preview to see how they will be tracked.

    Sources

    Editorial note: DNR's construction page is inconsistent about which rule subsection numbers apply to de minimis, minor, and general permits; subsection numbers are omitted here. Numeric thresholds were not stated on the DNR pages reviewed.

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