Maryland Hazardous Air Pollutants: What you need to know

Governing Law and Regulations

National Emissions Standards for Hazardous Air Pollutants (NESHAP): 40 CFR 61 and 40 CFR 63

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Maryland toxic air pollutants (TAP): Code of Maryland Regulations (COMAR) 26.11.15 to 26.11.16

Applicability: COMAR

Definitions: COMAR

Exemptions: COMAR

Quantifying emissions: COMAR

Control technology requirements: COMAR

Ambient impact requirements: COMAR and COMAR to

Screening levels: COMAR

Special permits: COMAR


Coal-fired power plant emissions: COMAR 26.11.27

Regulatory Agency

Maryland Department of the Environment (MDE) Air and Radiation Management Administration (ARMA) Air Toxics Office

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Maryland has developed a list of TAPs significantly more extensive than the federal HAP list, and has established a state program to permit and control the discharge of TAPs that requires sources to quantify emissions, install emissions controls, and evaluate the ambient impact of emissions. EPA has established National Emissions Standards for Hazardous Air Pollutants (NESHAP), including source-specific NESHAPs, known as maximum achievable control technology (MACT) standards, to regulate emissions of hazardous air pollutants (HAPs) into the atmosphere. Sources in Maryland must comply with any applicable NESHAPs, but any sources subject to such provisions are not required to comply with the state's requirements for emissions controls or ambient impact evaluations.

In addition, Maryland has promulgated regulations ...

>> Read more about Hazardous Air Pollutants

State Requirements

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Maryland Hazardous Air Pollutants Resources

Hazardous Air Pollutants Products

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