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AirPermitHub

LA · EPA Region 6

Louisiana Air Permits

In Louisiana any source that emits or could emit an air contaminant generally needs an air permit unless an exception applies. Very small facilities are excused by statute (Act 547) or can use the small source exemption (LAC 33:III.501.B.4); insignificant activities are listed in LAC 33:III.501.B.5. Other non-Part 70 facilities get state minor source permits under LAC 33:III.503, or coverage under minor source general permits such as the one for crude oil and natural gas production. Major sources need Part 70 (Title V) permits under LAC 33:III.507, plus PSD or nonattainment NSR for major projects.
Partially verifiedLast reviewed 2026-10-25
Partially verified. Specific PSD and nonattainment section numbers and Title V thresholds were not stated on the LDEQ pages reviewed. The LAC 33:III Part III PDF is the copy posted on LDEQ's site; check for later amendments. Chapter 2 and 51 titles are summarized.

Air permits & authorizations

  • No permit required (Act 547 / R.S. 30:2054(B)(2)(b)(ix))

    Exemption

    Facilities with facility-wide potential emissions below the limits generally need no permit; before exceeding them, apply for a permit or small source exemption. Portable source emissions count totals from all sites.

    Thresholds (summarized from source, not a quotation)

    Per LDEQ: below 5 TPY of each regulated pollutant, below 15 TPY combined, and below the minimum emission rate (MER) for each toxic air pollutant.

    Official page

  • Small Source Exemption

    Exemption

    For non-major sources with low emissions of regulated pollutants and toxic air pollutants below the MER (LAC 33:III.5112, Table 51.1), needing no enforceable permit conditions and no public notice.

    Thresholds (summarized from source, not a quotation)

    No more than 5 TPY of any regulated pollutant and less than the MER for each toxic air pollutant (restated from LDEQ).

    LAC 33:III.501.B.4Official page

  • Insignificant Activities

    Exemption

    Listed activities exempt from permitting based on size, pollutant, and activity; case-by-case claims under 501.B.5.D.

    LAC 33:III.501.B.5Official page

  • Minor Source General Permits

    General Permit

    General permits for numerous similar sources, including crude oil and natural gas production facilities.

    LAC 33:III.513.AOfficial page

  • State (Minor Source) Permit

    Minor NSR

    For facilities not exempt and not Part 70 sources. Synthetic minor sources accept federally enforceable limits with public notice under LAC 33:III.531.A.1. Fees under LAC 33:III Chapter 2.

    LAC 33:III.503Official page

Major NSR (PSD & nonattainment)

  • PSD

    PSD

    Major source review in attainment areas under LAC 33:III Chapter 5.

    LAC 33:III Chapter 5Official page

  • Nonattainment New Source Review

    Nonattainment NSR

    Major source review in nonattainment areas under LAC 33:III Chapter 5.

    LAC 33:III Chapter 5Official page

Title V operating permits

  • Part 70 (Title V) Operating Permit

    Title V

    For major sources; Title V general permits also exist.

    LAC 33:III.507; 40 CFR Part 70Official page

Oil & Gas

Louisiana has a minor source general permit for crude oil and natural gas production facilities (SIC 1311) and midstream gas compression and processing (SIC 1389), with lower facility-wide limits in the five-parish Baton Rouge area. Part 70 sources and some others are excluded.

  • Minor Source General Permit: Crude Oil and Natural Gas Production Facilities

    General Permit

    Covers field production and midstream compression/processing below facility-wide limits. Excludes Part 70 sources and facilities subject to LAC 33:III Chapter 59 or 40 CFR Part 68, among others.

    Thresholds (summarized from source, not a quotation)

    Per LDEQ general permit (facility-wide PTE, tpy): Baton Rouge area (Ascension, East Baton Rouge, Iberville, Livingston, West Baton Rouge): PM10 15, SO2 40, NOx 20, CO 90, VOC 20, total TAPs 20, individual TAP 8. Other parishes: same except NOx 90 and VOC 90.

    LAC 33:III.513.AOfficial page

  • Statement of Basis for the oil and gas general permit

    Other

    Technical basis for the 2016 general permit modifications.

    Official page
Oil & Gas industry hub

State air regulations

  • LAC 33:III (Part III, Air)Louisiana Environmental Regulatory Code, Air
  • LAC 33:III Chapter 5Permit Procedures (501 exemptions, 503 minor source, 507 Part 70, 513 general permits)
  • LAC 33:III Chapter 2Emission Inventory and permit fees
  • LAC 33:III Chapter 51Comprehensive Toxic Air Pollutant Emission Control Program (MER Table 51.1)

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

AirPermitHub provides educational, engineering, research, and compliance-support information. Information provided by the platform does not constitute legal advice and should not replace review of applicable regulations, permits, agency guidance, or consultation with qualified professionals. Full disclaimer