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Pollutants Measured in the Community Air Screen Program

List of Air Toxics
Chemical CAS#a 112(k)b
1,1,1-Trichloroethane 71-55-6
1,1,2,2-Tetrachloroethane 79-34-5 X
1,1,2-Trichloroethane 79-00-5
1,1-Dichloroethane 75-34-3
1,1-Dichloroethylene 75-35-4
1,2,4-Trichlorobenzene 120-82-1
1,2,4-Trimethylbenzene 95-63-6
1,2-Dibromoethane 106-93-4
1,2-Dichlorobenzene 95-50-1
1,2-Dichloroethane 107-06-2 X
1,2-Dichloropropane 78-87-5 X
1,3,5-Trimethylbenzene 108-67-8
1,3-Butadiene 106-99-0 X
1,3-Dichlorobenzene 541-73-1
1,4-Dichlorobenzene 106-46-7
a-Chlorotoluene (Benzylchloride) 100-44-7
Benzene 71-43-2 X
Bromodichloromethane 75-27-4
Bromomethane 74-83-9
Carbon disulfide 75-15-0
Carbon tetrachloride 56-23-5 X
Chlorobenzene 108-90-7
Chloroethane 75-00-3
Chloroform 67-66-3 X
Chloromethane 74-87-3
cis1,3-Dichloropropene 542-75-6
cis1,2-Dichloroethylene 156-59-2
Dichlorodifluoromethane 75-71-8
Dichlorotetrafluoroethane 76-14-2
Ethylbenzene 100-41-4
Hexachloro-1,3-butadiene 87-68-3
m,p-Xylene 1330-20-7
Methyl tert butyl ether 1634-04-4
Methylene chloride (dichloromethane) 75-09-2 X
o-Xylene 95-47-6
Styrene 100-42-5
Tetrachloroethylene (perchloroethylene) 127-18-4 X
Toluene 108-88-3
trans1,3-Dichloropropene 542-75-6
Trichloroethylene 79-01-6 X
Trichlorofluoromethane 75-69-4
Trichlorotrifluoroethane 76-13-1
Vinyl chloride 75-01-4 X

a CAS# - chemical abstract number is a unique registry number assigned to each chemical.
b These are among the 33 priority hazardous air pollutants listed in Section 112(k) of the Clean Air Act. These pollutants are deemed to be most toxic and/or most prevalent in urban areas across the nation.

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