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:
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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
Regulations:
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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.
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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)
 40 CFR Part 61 NESHAP, Subparts A through FF (61.01 through 61.359)
 40 CFR Part 63 NESHAP, Subparts A through Z (63.1 through 63.599)
 40 CFR Part 63 NESHAP, Subparts AA through DDD (63.600 through 63.1199)
 40 CFR Part 63 NESHAP, Subparts EEE through PPP (63.1200 through 63.1439)
 40 CFR Part 63 NESHAP, Subparts QQQ through YYYY (63.1440 through 63.6175)
 40 CFR Part 63 NESHAP, Subparts ZZZZ through MMMMM (63.6580 through 63.8830)
 40 CFR Part 63 NESHAP, Subparts NNNNN through HHHHHHH (63.8980 through 63.12005)
NESHAP Guidance:
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Major Source Rules
Area Source General Information
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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:
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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.