Indiana Code Title 13. Environment § 13-11-2-42

Sec. 42. “Contaminant”, for purposes of environmental management laws, means any solid, semi-solid, liquid, or gaseous matter, or any odor, radioactive material, pollutant (as defined by the Federal Water Pollution Control Act (33 U.S.C. 1251 et seq.), as in effect on January 1, 1989), hazardous waste (as defined in the federal Solid Waste Disposal Act (42 U.S.C. 6901 et seq.), as in effect on January 1, 1989), any constituent of a hazardous waste, or any combination of the items described in this section, from whatever source, that:

The term includes chemicals used in the illegal manufacture of a controlled substance (as defined in IC 35-48-1.1-7) or an immediate precursor (as defined in IC 35-48-1.1-25) of a controlled substance, and waste produced from the illegal manufacture of a controlled substance or an immediate precursor of the controlled substance.