Department of
Environmental Quality

To protect human health and the environment, distinct programs are in place to regulate emissions of hazardous and toxic pollutants by industrial sources. Other regulatory measures also apply to certain sources.

National Emission Standards for Hazardous Air Pollutants (NESHAPs)

The NESHAPs, also called Maximum Achievable Control Technology (MACT) standards, are air quality standards that regulate 188 hazardous air pollutants  from particular industrial sources. Learn more.

New Source Performance Standards (NSPS)

The NSPS are federal standards adopted by EPA to regulate air emissions of criteria pollutants by many types of industrial facilities. The standards are intended to promote use of the best air pollution control technologies. Learn more.

Toxic Air Pollutants (TAP) Program

Idaho's TAP Program is a stand-alone risk-based program that regulates approximately 350 pollutants determined by their nature to be toxic to human or animal life or vegetation. Idaho's regulations prohibit emission of these contaminants alone or in combination with other contaminants in amounts that would injure or unreasonably affect human or animal life or vegetation. Learn more.

Chemical Accidental Release and Prevention

Under the Risk Management Programs for Chemical Accidental Release Prevention Rule, promulgated by EPA in 1996, public and private facilities that manufacture, process, use, store, or otherwise handle certain regulated substances are required to prepare and execute a risk management program. Learn more.

Emission Reduction Credits

Idaho rules allow facilities that generate air pollution to earn emission reduction credits (ERCs) and establishes procedures for facilities to bank the ERCs they earn with DEQ. Learn more.