Air

The Air Division is responsible for ensuring that air quality within Mississippi is protective of public health and welfare. The division is charged with controlling, preventing, and abating air pollution to achieve compliance with air emission regulations pursuant to the Mississippi Air and Water Pollution Control Act, applicable regulations promulgated by the U.S. Environmental Protection Agency (EPA), and the federal Clean Air Act.

To sign up to receive notifications on Air Division notices or air-related updates, please visit our Air Notice Distribution Webpage.

For information regarding air permits and related application forms, visit the Environmental Permits Division.

For information regarding air compliance and enforcement, visit the Environmental Compliance and Enforcement Division.

State Rulemakings

Final Amendments to 11 Miss. Admin. Code Part 2, Chapter 6 – “Air Emissions Operating Permit Regulations for Purposes of Title V of the Federal Clean Air Act” (Effective August 19, 2024)

Federal Rulemakings

MDEQ hereby provides notice on the opportunity to comment on the proposed amendments to the agency’s asbestos regulations – titled ““Regulations for the Accreditation and Certification of Asbestos Abatement Personnel” (Mississippi Administrative Code, Title 11, Part 2, Chapter 10). The public comment period will begin January 22, 2026, and end February 23, 2026. Any interested party that wishes to provide comment may do by submitting comments (via hand-mail or electronically) to the attention of Mr. Dennis Kelly. In addition, a public hearing will be held virtually via Zoom on Monday, February 23, 2026, at 1:30 pm. To participate in the hearing, please register here. or contact Bryan Williams at 601-961-5799 / bwilliams@mdeq.ms.gov.

Below please find the official notice as well as a “clean version” and “redline version” of the proposed regulations.

Regulations for the Accreditation and Certification of Asbestos Abatement Personnel

Wednesday, January 22, 2025.

National Emissions Standards for Hazardous Air Pollutants: Chemical Manufacturing Area Source (CMAS), Technology Review, Proposed rule (a new area source category for Ethylene Oxide (EtO), plus…)

40 CFR Part 63, subpart VVVVVV (6V)

Thursday, January 16, 2025

New source Performance Standards and Emission Guidelines for Existing Sources: Large Municipal Waste Combustors Voluntary Remand Response and 5-Year Review, Proposed rule.

Reopening the public comment period for an additional 6 months (reference: FR Tuesday, January 23, 2024)

Wednesday, January 15 & 17, 2025

New Source Performance Standards for New, Reconstructed, and Modified Sources and Emissions Guidelines for Existing Sources:

Oil and Natural Gas Sector Climate Review. Proposed amendments

EPA is proposing amendments in response to petitions for reconsideration. Specifically, this action proposes discrete technical changes to two different aspects of the rules.

40 CFR part 60, subpart OOOOb, OOOOc A Correction to this proposed amendment was made in the January 17, 2025, FR:

Tuesday, January 7, 2025

Re-classifications of Major Sources as Area Sources of the Clean Air Act: Correction to General Provisions.

40 CFR Part 63, Subpart A, General Provisions

Tuesday, January 7, 2025

National Emissions Standards for Hazardous Air Pollutants: Perchlorethylene Standards for Dry Cleaning Facilities, Technology Review, final determination.

“This final rule does not finalize the changes made at proposal and makes no amendments to the current NESHAP”

40 CFR Part 63, Subpart M A correction rule was made on February 19, 2025.