The following is a list of substances that is reported under the National Pollutant Invetory (NPI).

Acetaldehyde
Acetic acid (ethanoic acid)
Acetone
Acetonitrile
Acrylamide
Acrylic acid
Acrylonitrile (2-propenenitrile)
Ammonia (total)
Aniline (benzenamine)
Antimony & compounds
Arsenic & compounds
Benzene
Benzene hexachloro- (HCB)
Beryllium & compounds
Biphenyl (1,1-biphenyl)
Boron & compounds
1,3-Butadiene (vinyl ethylene)
Cadmium & compounds
Carbon disulfide
Carbon monoxide
Chlorine
Chlorine dioxide
Chloroethane (ethyl chloride)
Chloroform (trichloromethane)
Chlorophenols (di, tri, tetra)
Chromium (III) compounds
Chromium (VI) compounds
Cobalt & compounds
Copper & compounds
Cumene (1-methylethylbenzene)
Cyanide (inorganic) compounds
Cyclohexane
1,2-Dibromoethane
Dibutyl phthalate
1,2-Dichloroethane
Dichloromethane
Ethanol
2-Ethoxyethanol
2-Ethoxyethanol acetate
Ethyl acetate
Ethyl butyl ketone
Ethylbenzene
Ethylene glycol (1,2-ethanediol)
Ethylene oxide
Di-(2-Ethylhexyl) phthalate (DEHP)
Fluoride compounds
Formaldehyde (methyl aldehyde)
Glutaraldehyde
n-Hexane
Hydrochloric acid
Hydrogen sulfide
Lead & compounds
Magnesium oxide fume
Manganese & compounds
Mercury & compounds
Methanol
2-Methoxyethanol
2-Methoxyethanol acetate
Methyl ethyl ketone
Methyl isobutyl ketone
Methyl methacrylate
4,4'-Methylene-bis(2-chloroaniline) (MOCA)
Methylenebis (phenylisocyanate)
Nickel & compounds
Nickel carbonyl
Nickel subsulfide
Nitric acid
Organo-tin compounds
Oxides of nitrogen
Particulate Matter 10.0 um (PM10)
Phenol
Phosphoric acid
Polychlorinated dioxins and furans
Polycyclic aromatic hydrocarbons
Selenium & compounds
Styrene (ethenylbenzene)
Sulfur dioxide
Sulfuric acid
1,1,1,2-Tetrachloroethane
Tetrachloroethylene
Toluene (methylbenzene)
Toluene-2,4-diisocyanate
Total nitrogen
Total phosphorus
Total volatile organic compounds
1,1,2-Trichloroethane
Trichloroethylene
Vinyl chloride monomer
Xylenes (individual or mixed isomers)
Zinc and compounds