# List of 177 Pollutants in the Assessment

Note: EPA no longer updates this information, but it may be useful as a reference or resource.

Pollutant Name |
CAS Number |
Overall Confidence Rating |
Exposure/Risk Assessment |
Assessed as Carcinogen? |
Assessed as Noncancer Hazard? |

Acetaldehyde | 75070 | lower | Y | X | X |

Acetamide | 60355 | lower | Y | X | |

Acetonitrile | 75058 | higher | Y | X | |

Acetophenone | 98862 | N | |||

2-Acetylaminofluorene | 53963 | N | |||

Acrolein | 107028 | lower | Y | X | |

Acrylamide | 79061 | lower | Y | X | X |

Acrylic acid | 79107 | medium | Y | X | |

Acrylonitrile | 107131 | higher | Y | X | X |

Allyl chloride | 107051 | medium | Y | X | X |

4-Aminobiphenyl | 92671 | N | |||

Aniline | 62533 | lower | Y | X | X |

o-Anisidine | 90040 | N | |||

Antimony compounds | N/A | lower | Y | X | |

Arsenic compounds (inorganic, may include arsine) | N/A | lower | Y | X | X |

Arsine | 7784421 | lower | Y | X | |

Asbestos | 1332214 | N | |||

Benzene | 71432 | higher | Y | X | X |

Benzidine | 92875 | lower | Y | X | X |

Benzotrichloride | 98077 | medium | Y | X | |

Benzyl chloride | 100447 | higher | Y | X | |

Beryllium compounds | N/A | lower | Y | X | X |

Biphenyl | 92524 | N | |||

Bis(2-ethylhexyl)phthalate | 117817 | higher | Y | X | X |

Bis(chloromethyl)ether | 542881 | medium | Y | X | |

Bromoform | 75252 | medium | Y | X | |

1,3-Butadiene | 106990 | lower | Y | X | X |

Cadmium compounds | N/A | lower | Y | X | X |

Calcium cyanamide | 156627 | N | |||

Captan | 133062 | lower | Y | X | |

Carbaryl | 63252 | N | |||

Carbon disulfide | 75150 | higher | Y | X | |

Carbon tetrachloride | 56235 | medium | Y | X | X |

Carbonyl sulfide | 463581 | N | |||

Catechol | 120809 | N | |||

Chlordane | 57749 | medium | Y | X | X |

Chlorine | 7782505 | lower | Y | X | |

Chloroacetic acid | 79118 | N | |||

2-Chloroacetophenone | 532274 | medium | Y | X | |

Chlorobenzene | 108907 | higher | Y | X | |

Chlorobenzilate | 510156 | medium | Y | X | |

Chloroform | 67663 | medium | Y | X | |

Chloromethyl methyl ether | 107302 | N | |||

Chloroprene | 126998 | lower | Y | X | |

Chromium III | 10105831 | N | |||

Chromium VI | 18540299 | lower | Y | X | X |

Cobalt compounds | N/A | lower | Y | X | |

Coke Oven Emissions | N/A | medium | Y | X | |

Cresols_Cresylic acid (isomers and mixture) | 1319773 | lower | Y | X | |

Cumene | 98828 | higher | Y | X | |

Cyanide compounds | N/A | higher | Y | X | |

Diazomethane | 334883 | N | |||

Dibenzofurans | 132649 | N | |||

1,2-Dibromo-3-chloropropane | 96128 | medium | Y | X | X |

Dibutylphthalate | 84742 | N | |||

p-Dichlorobenzene | 106467 | higher | Y | X | X |

3,3-Dichlorobenzidene | 91941 | medium | Y | X | |

Dichloroethyl ether | 111444 | medium | Y | X | |

1,3-Dichloropropene | 542756 | medium | Y | X | X |

Dichlorvos | 62737 | medium | Y | X | X |

Diesel particulate matter | N/A | medium | Y | X | |

Diethanolamine | 111422 | lower | Y | X | |

Diethyl sulfate | 64675 | N | |||

3,3-Dimethoxybenzidine | 119904 | lower | Y | X | |

p-Dimethylaminoazobenzene | 60117 | lower | Y | X | |

Dimethyl carbamoyl chloride | 79447 | N | |||

Dimethyl formamide | 68122 | lower | Y | X | |

1,1-Dimethyl hydrazine | 57147 | N | |||

Dimethyl phthalate | 131113 | N | |||

Dimethyl sulfate | 77781 | N | |||

3,3-Dimethyl benzidine | 119937 | lower | Y | X | |

4,6-Dinitro-o-cresol, and salts | 534521 | N | |||

2,4-Dinitrophenol | 51285 | N | |||

2,4-Dinitrotoluene | 121142 | medium | Y | X | X |

1,4-Dioxane | 123911 | medium | Y | X | X |

1,2-Diphenylhydrazine | 122667 | lower | Y | X | |

Epichlorohydrin | 106898 | medium | Y | X | X |

1,2-Epoxybutane | 106887 | medium | Y | X | |

Ethyl acrylate | 140885 | medium | Y | X | |

Ethyl benzene | 100414 | medium | Y | X | |

Ethyl carbamate | 51796 | medium | Y | X | |

Ethyl chloride | 75003 | medium | Y | X | |

Ethylene dibromide | 106934 | medium | Y | X | X |

Ethylene dichloride | 107062 | medium | Y | X | X |

Ethylene glycol | 107211 | higher | Y | X | |

Ethylene imine (Aziridine) | 151564 | N | |||

Ethylene oxide | 75218 | higher | Y | X | X |

Ethylene thiourea | 96457 | lower | Y | X | X |

Ethylidene dichloride | 75343 | medium | Y | X | X |

Fine mineral fibers | N/A | N | |||

Formaldehyde | 50000 | medium | Y | X | X |

Glycol ethers | N/A | medium | Y | X | |

Heptachlor | 76448 | N | |||

Hexachlorobenzene | 118741 | medium | Y | X | X |

Hexachlorobutadiene | 87683 | medium | Y | X | X |

Hexachlorocyclopentadiene | 77474 | medium | Y | X | |

Hexachloroethane | 67721 | medium | Y | X | X |

Hexamethylene-1,6-diisocyanate | 822060 | medium | Y | X | |

Hexamethylphosphoramide | 680319 | N | |||

Hexane | 110543 | higher | Y | X | |

Hydrazine | 302012 | lower | Y | X | X |

Hydrochloric acid | 7647010 | lower | Y | X | |

Hydrofluoric acid | 7664393 | higher | Y | X | |

Hydroquinone | 123319 | N | |||

Isophorone | 78591 | lower | Y | X | X |

Lead compounds | N/A | lower | Y | X | |

Lindane (all isomers) | 58899 | medium | Y | X | X |

Maleic anhydride | 108316 | lower | Y | X | |

Manganese compounds | N/A | lower | Y | X | |

Mercury compounds | N/A | lower | Y | X | |

Methanol | 67561 | higher | Y | X | |

Methoxychlor | 72435 | N | |||

Methyl bromide | 74839 | higher | Y | X | |

Methyl chloride | 74873 | higher | Y | X | |

Methyl chloroform | 71556 | higher | Y | X | |

Methyl ethyl ketone | 78933 | higher | Y | X | |

Methyl hydrazine | 60344 | N | |||

Methyl iodide | 74884 | N | |||

Methyl isobutyl ketone | 108101 | medium | Y | X | |

Methyl isocyanate | 624839 | medium | Y | X | |

Methyl methacrylate | 80626 | lower | Y | X | |

Methyl tert butyl ether | 1634044 | higher | Y | X | |

Methylene chloride | 75092 | medium | Y | X | X |

4,4'-Methylene bis(2-chloroaniline) | 101144 | lower | Y | X | |

4,4'-Methylenedianiline | 101779 | medium | Y | X | X |

Methylene diphenyl diisocyanate | 101688 | Y | X | ||

N,N-Dimethyl aniline | 121697 | N | |||

Naphthalene | 91203 | medium | Y | X | X |

Nickel compounds | N/A | lower | Y | X | X |

Nitrobenzene | 98953 | lower | Y | X | |

4-Nitrobiphenyl | 92933 | N | |||

4-Nitrophenol | 100027 | N | |||

2-Nitropropane | 79469 | medium | Y | X | |

Nitrosodimethylamine | 62759 | lower | Y | X | |

N-Nitrosomorpholine | 59892 | lower | Y | X | |

N-Nitroso-N-methylurea | 684935 | N | |||

Parathion | 56382 | N | |||

Pentachloronitrobenzene | 82688 | medium | Y | X | |

Pentachlorophenol | 87865 | medium | Y | X | X |

Perchloroethylene | 127184 | medium | Y | X | X |

Phenol | 108952 | lower | Y | X | |

p-Phenylenediamine | 106503 | N | |||

Phosgene | 75445 | medium | Y | X | |

Phosphine | 7803512 | medium | Y | X | |

Phthalic anhydride | 85449 | medium | Y | X | |

Polychlorinated biphenyls (PCBs) | 1336363 | medium | Y | X | |

Polycyclic Organic Matter (POM) | N/A | ||||

POM Group 1: Unspeciated | N/A | medium | Y | X | |

POM Group 2: no URE data | N/A | medium | Y | X | |

POM Group 3 | N/A | medium | Y | X | |

POM Group 4 | N/A | medium | Y | X | |

POM Group 5 | N/A | medium | Y | X | |

POM Group 6 | N/A | medium | Y | X | |

POM Group 7 | N/A | medium | Y | X | |

POM Group 8 | N/A | medium | Y | X | |

1,3-Propane sultone | 1120714 | lower | Y | X | |

beta-Propiolactone | 57578 | N | |||

Propionaldehyde | 123386 | N | |||

Propoxur | 114261 | N | |||

Propylene dichloride | 78875 | lower | Y | X | X |

Propylene oxide | 75569 | higher | Y | X | X |

1,2-Propylenimine | 75558 | N | |||

Quinoline | 91225 | lower | Y | X | |

Quinone | 106514 | N | |||

2,4-D, salts and esters | 94757 | N | |||

Selenium Compounds | N/A | lower | Y | X | |

Styrene | 100425 | lower | Y | X | |

Styrene oxide | 96093 | medium | Y | X | |

1,1,2,2-Tetrachloroethane | 79345 | medium | Y | X | |

Titanium tetrachloride | 7550450 | lower | Y | X | |

Toluene | 108883 | medium | Y | X | |

2,4-Toluene diamine | 95807 | lower | Y | X | |

2,4-Toluene diisocyanate | 584849 | lower | Y | X | X |

o-Toluidine | 95534 | lower | Y | X | |

Toxaphene | 8001352 | medium | Y | X | |

1,2,4-Trichlorobenzene | 120821 | medium | Y | X | |

1,1,2-Trichloroethane | 79005 | medium | Y | X | X |

Trichloroethylene | 79016 | medium | Y | X | X |

2,4,5-Trichlorophenol | 95954 | N | |||

2,4,6-Trichlorophenol | 88062 | medium | Y | X | |

Triethylamine | 121448 | lower | Y | X | |

Trifluralin | 1582098 | lower | Y | X | |

2,2,4-Trimethylpentane | 540841 | N | |||

Vinyl acetate | 108054 | medium | Y | X | |

Vinyl bromide | 593602 | medium | Y | X | X |

Vinyl chloride | 75014 | medium | Y | X | X |

Vinylidene chloride | 75354 | medium | Y | X | |

Xylenes (isomers and mixture) | 1330207 | medium | Y | X | |