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AirPermitHub

MS · EPA Region 4

Mississippi Air Permits

Mississippi requires a Permit to Construct for new facilities unless a facility-wide exclusion under Rule 2.13 applies. Construction permits are PSD (major), PSD-avoidance (moderate sources taking limits), or minor. Operating permits are Title V (Chapter 6), Synthetic Minor Operating Permits, or State Operating Permits for listed significant minor source types; true minor sources need no operating permit. MDEQ charges no air permit application fees; only Title V facilities pay annual fees.
Verified against agency sourceLast reviewed 2026-10-25

Air permits & authorizations

  • Permit to Construct exclusions

    Exemption

    Facility-wide exclusions under Rule 2.13.D and 2.13.E. The common Rule 2.13.D(5) exclusion does not apply to facilities with hazardous or solid waste incinerators or to CAFOs.

    Thresholds (summarized from source, not a quotation)

    Per MDEQ (Rule 2.13.D(5)): facility-wide potential emissions below 10 tpy each of PM10, SO2, NOx, CO, and VOC; below 1.0 tpy any single HAP; below 2.5 tpy total HAPs.

    11 Miss. Admin. Code Pt. 2, Ch. 2, R. 2.13.D-EOfficial page

  • General Permits

    General Permit

    MDEQ lists an Oil Production General Permit under air general permits, and multimedia general permits such as the Hot-Mix Asphalt General Permit.

    Official page

  • Permit to Construct (minor and PSD-avoidance)

    Minor NSR

    Minor sources below PSD thresholds without limits need a Permit to Construct unless excluded; moderate sources take federally enforceable limits through a PSD-Avoidance Permit to Construct. De minimis modifications (below 3/4 of significance or major thresholds) have a simplified path. Pre-permit construction at the applicant's risk is available for some projects (Rule 2.15.B).

    11 Miss. Admin. Code Pt. 2, Ch. 2Official page

  • Synthetic Minor Operating Permit (SMOP) and State Operating Permit

    State Operating

    SMOPs set federally enforceable limits to avoid Title V. State Operating Permits are required for listed significant minor source types (e.g., cotton gins, rendering plants) under Rule 2.1.C(25).

    11 Miss. Admin. Code Pt. 2, Ch. 2Official page

Major NSR (PSD & nonattainment)

  • PSD Permit to Construct

    PSD

    Adopts 40 CFR 52.21 with some exceptions. MDEQ estimates 150+ days.

    11 Miss. Admin. Code Pt. 2, Ch. 5Official page

Title V operating permits

  • Title V Operating Permit (TVOP)

    Title V

    For major sources; revisions are administrative amendments, minor or significant modifications, or 502(b)(10) changes. Optional Title V modification path under Rule 2.15.C.

    Thresholds (summarized from source, not a quotation)

    Per MDEQ: potential emissions above 100 tpy of a criteria pollutant, 10 tpy of any single HAP, or 25 tpy of total HAPs.

    11 Miss. Admin. Code Pt. 2, Ch. 6Official page

Oil & Gas

MDEQ lists an Oil Production General Permit under its air general permits. No other oil-and-gas-specific air provisions were described in MDEQ's permitting guide.

  • Oil Production General Permit

    General Permit

    Air general permit listed by MDEQ; details are on the general permits page.

    Official page
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: MDEQ proposed revisions to Chapter 2 in late 2023 (prehearing drafts posted); the linked Chapter 2 PDF is dated 2017. Chapter 2 and 6 titles are summarized.

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