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

Federal Rulemakings

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…)

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.

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.

Tuesday, January 7, 2025

Re-classifications of Major Sources as Area Sources of the Clean Air Act: Correction to 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”

News and Notices

MDEQ hereby provides notice and the opportunity to comment on the draft second 10-year maintenance plan for the 2008 Ozone National Ambient Air Quality Standard (NAAQS) with regard to Desoto County, Mississippi.  This draft maintenance plan demonstrates that Desoto County will maintain attainment with the 2008 Ozone NAAQS (i.e., 0.075 ppm) for the 10-year period of 2016 – 2036.  The public comment period will begin November 21, 2025, and end December 22, 2025, at 11:59 PM.  Please submit any comments and/or questions to Mr. Jaricus Whitlock at jwhitlock@mdeq.ms.gov.

PLEASE NOTE:  For the “Mississippi Maintenance Plan Appendices”, please extract all folders before accessing any file contained therein

The Mississippi Department of Environmental Quality (MDEQ) is requesting public comment on a proposal to exclude certain PM2.5 air quality data for DeSoto County from 2022-2024. MDEQ has determined this data was influenced by exceptional events, such as wildfire smoke and Saharan dust. The public comment period is open until August 15, 2025.

Contact Information

Air Division Organizational Chart