Pollutants Unwanted chemicals or other materials found in the air.
Pollutants can harm health, the environment and property.
Pollutant is defined in the CWA to include dredged spoil, solid waste, incinerator residue, sewage, garbage, munitions, chemicals waste, biological materials, radioactive materials, heat, wrecked or discarded equipment, rock sand, industrial, municipal, and agricultural waste discharged into water.