Definitions for "Hazardous air pollutant"
(HAP) An air pollutant considered by EPA to be particularly hazardous to health.
Any air pollutant listed pursuant to section 112(b) of the FCAA. Fed
A hazardous air pollutant is a substance that is defined as hazardous by the 1990 amendments of the Clean Air Act. These substances include certain volatile organic chemicals, pesticides, herbicides, and radionuclides that present tangible hazard, based on scientific studies of exposure to humans and other mammals.