Governing Law and Regulations
New Hampshire Department of Environmental Services (DES) Air Resources Division (ARD)
See national section for basic information and federal regulations.
Comparison: State vs. Federal
• Rules. New Hampshire has a state program to control the discharge of toxic air pollutants by requiring all sources to comply with ambient air limits established by the New Hampshire Department of Environmental Services (DES) for approximately 750 regulated toxic air pollutants (RTAPs), as well as emissions rate limits for specific toxic particulate matter. In addition, all applicable sources in New Hampshire must comply with the National Emissions Standards for Hazardous Air Pollutants (NESHAPs), including the source-specific NESHAPs known as maximum achievable control technology (MACT) standards. For more information, see the national section HAZARDOUS AIR POLLUTANTS.
• Administration and enforcement. DES's Air Resources Division (ARD) has been delegated authority by the U.S. Environmental Protection Agency (EPA) to administer and enforce the NESHAP requirements and also administers and enforces the state toxic air pollutant regulations.
New Hampshire DES has adopted the federal list of ...