Hazardous Air Pollutants

Hazardous air pollutants are defined by the Federal Clean Air Act as pollutants that cause or may cause cancer or other serious health effects, such as reproductive effects or birth defects, or adverse environmental and ecological effects. MDEQ implements hazardous air pollutant regulations that include Maximum Achievable Control Technology (MACT) standards and other National Emission Standards for Hazardous Air Pollutants (NESHAP) and also provides technical assistance for the requirements of regulations to anyone who may be interested. A list of Hazardous Air Pollutants can be viewed here.

MDEQ Activities Include
  • Processing regulation promulgations and amendments and identification of regulated facilities within the state
  • Providing technical assistance for the requirements of regulations to anyone who may be interested
  • Air Toxics Monitoring
  • State
Air Emission Regulations for the Prevention, Abatement, and Control of Air Contaminants -Rule 1.8 of
11 Miss. Admin. Code Pt. 2, Ch. 1.
Air Toxics Regulations- 11 Miss. Admin. Code Pt. 2, Ch. 8.
  • Federal
Pollutant Specific NESHAP Rules – 40 CFR Part 61
NESHAP Rules for Source Categories – 40 CFR Part 63
Residual Risk/Technology Rules
Consolidated Federal Register Versions of the NESHAP Rules (e-CFR)
NESHAP Guidance
Major Source Rules
Area Source General Information
Area Source Rule Compilation
Guidance for Paint Stripping and Miscellaneous Surface Coating Operations, 40 CFR Part 63, Subpart HHHHHH
Area Source Boiler Rule – 40 CFR Part 63, Subpart JJJJJJ

Summary of Energy Assessment Requirements for Area Source Boilers
Area Source Boiler Information Video Series
Using EPA’s Compliance and Emissions Data Reporting Interface (CEDRI) through EPA’s Central Data Exchange (video)
Submitting a Notification of Compliance Status (video)
FREE, Non-regulatory, Confidential and On-site Technical Assistance is available per request through the Mississippi Small Business Environmental Assistance Program (SBEAP). For more information, call the SBEAP Hot Line at 800-725-6112 or visit the Small Business Technical Assistance Program website.
Other Information
EPA’s Air Toxics Website
Air Toxics Monitoring

Ambient air monitoring for hazardous air pollutants has been done at various locations (link below) throughout the state off and on from May of 2001 through December of 2013. The specific monitoring efforts have included the characterization of air quality for concentrations of common hazardous air pollutant emissions in areas of more likely incidence of elevated levels. These efforts have included the EPA’s Urban Air Toxics Monitoring Program, an evaluation of ambient air quality impacts following Hurricane Katrina, participation in EPA’s Air Toxics in Schools Study, and a study to evaluate ambient air concentrations in Columbus, MS.

The data produced from these efforts, available through the link below, provided a favorable picture of air quality for the pollutants and areas monitored, indicating no problem or troublesome conditions that warranted corrective actions.

Map of Monitoring Locations in Mississippi
EPA’s Air Data: Access to Air Pollution Data
Contacts For more information concerning Hazardous Air Pollutants, you may contact the Air Toxics Branch