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2011 ATSDR CEP Site Count Report

Rank Substance Name All Sites/
Events		 NPL Sites CAS RN
1 LEAD 510 271 007439-92-1
2 ARSENIC 453 234 007440-38-2
3 TRICHLOROETHYLENE 405 291 000079-01-6
4 TETRACHLOROETHYLENE 320 213 000127-18-4
5 BENZENE 261 138 000071-43-2
6 CADMIUM 247 149 007440-43-9
7 MERCURY 225 99 007439-97-6
8 CHROMIUM 213 130 007440-47-3
9 POLYCHLORINATED BIPHENYLS 193 120 001336-36-3
10 MANGANESE 187 102 007439-96-5
11 COPPER 175 96 007440-50-8
12 ZINC 165 94 007440-66-6
13 VOLATILE ORGANIC COMPOUNDS N.O.S. 157 93 HZ1900-01-T
14 CHLOROFORM 133 91 000067-66-3
15 BENZO(A)PYRENE 132 63 000050-32-8
16 ANTIMONY 128 76 007440-36-0
17 VINYL CHLORIDE 127 93 000075-01-4
18 NICKEL 124 71 007440-02-0
19 1,1,1-TRICHLOROETHANE 123 97 000071-55-6
20 1,1-DICHLOROETHENE 120 96 000075-35-4
21 METHYLENE CHLORIDE 118 67 000075-09-2
22 POLYCYCLIC AROMATIC HYDROCARBONS 116 74 130498-29-2
23 TOLUENE 112 65 000108-88-3
24 BARIUM 109 56 007440-39-3
25 1,2-DICHLOROETHANE 104 78 000107-06-2
26 VANADIUM 104 54 007440-62-2
27 IRON 103 60 007439-89-6
28 CARBON TETRACHLORIDE 100 64 000056-23-5
29 BENZO(A)ANTHRACENE 97 45 000056-55-3
30 DI(2-ETHYLHEXYL)PHTHALATE 91 59 000117-81-7
31 CHRYSENE 90 42 000218-01-9
32 BENZO(B)FLUORANTHENE 90 34 000205-99-2
33 1,1-DICHLOROETHANE 88 71 000075-34-3
34 PHENANTHRENE 88 36 000085-01-8
35 NAPHTHALENE 85 41 000091-20-3
36 BERYLLIUM 85 39 007440-41-7
37 METALS N.O.S. 83 52 HZ0900-01-T
38 INDENO(1,2,3-CD)PYRENE 79 32 000193-39-5
39 BENZO(K)FLUORANTHENE 78 32 000207-08-9
40 ALUMINUM 77 44 007429-90-5
41 DIELDRIN 77 41 000060-57-1
42 XYLENES, TOTAL 76 38 001330-20-7
43 THALLIUM 73 39 007440-28-0
44 ETHYLBENZENE 71 39 000100-41-4
45 DIBENZO(A,H)ANTHRACENE 67 26 000053-70-3
46 PENTACHLOROPHENOL 66 43 000087-86-5
47 COBALT 65 27 007440-48-4
48 DDT, P,P’- 64 39 000050-29-3
49 BENZO(GHI)PERYLENE 64 24 000191-24-2
50 SELENIUM 60 23 007782-49-2
51 SODIUM 59 30 007440-23-5
52 DDE, P,P’- 58 34 000072-55-9
53 1,2-DICHLOROETHENE, CIS- 53 38 000156-59-2
54 1,2-DICHLOROETHENE, TRANS- 50 46 000156-60-5
55 DDD, P,P’- 50 28 000072-54-8
56 HEPTACHLOR EPOXIDE 49 23 001024-57-3
57 2-METHYLNAPHTHALENE 49 22 000091-57-6
58 FLUORANTHENE 49 18 000206-44-0
59 PYRENE 48 19 000129-00-0
60 1,2-DICHLOROETHYLENE 46 38 000540-59-0
61 CHLOROBENZENE 45 33 000108-90-7
62 AROCLOR 1260 45 27 011096-82-5
63 CYANIDE 45 23 000057-12-5
64 DIBENZOFURAN 43 20 000132-64-9
65 ASBESTOS 43 13 001332-21-4
66 CHLORDANE 42 29 000057-74-9
67 BROMODICHLOROMETHANE 41 27 000075-27-4
68 SILVER 41 18 007440-22-4
69 MAGNESIUM 39 21 007439-95-4
70 ALDRIN 38 16 000309-00-2
71 PESTICIDES N.O.S. 36 19 HZ1200-01-T
72 FLUORENE 36 13 000086-73-7
73 AROCLOR 1254 35 23 011097-69-1
74 ACETONE 35 18 000067-64-1
75 1,2,4-TRIMETHYLBENZENE 34 6 000095-63-6
76 HEPTACHLOR 33 14 000076-44-8
77 ACENAPHTHYLENE 33 12 000208-96-8
78 CARBAZOLE 33 10 000086-74-8
79 2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN 32 23 001746-01-6
80 2-BUTANONE 32 21 000078-93-3
80 DIOXINS N.O.S. 32 21 HZ0400-05-T
82 ANTHRACENE 32 9 000120-12-7
82 1,4-DICHLOROBENZENE 32 9 000106-46-7
84 NITRATE 31 20 014797-55-8
85 CALCIUM 30 21 007440-70-2
86 DIBROMOCHLOROMETHANE 29 18 000124-48-1
87 CHROMIUM, HEXAVALENT 29 14 018540-29-9
88 ACENAPHTHENE 29 9 000083-32-9
89 BUTYL BENZYL PHTHALATE 28 7 000085-68-7
90 1,1,2,2-TETRACHLOROETHANE 27 19 000079-34-5
91 DI-N-BUTYL PHTHALATE 27 10 000084-74-2
92 HYDROGEN SULFIDE 27 4 007783-06-4
93 1,1,2-TRICHLOROETHANE 26 20 000079-00-5
94 HEXACHLOROCYCLOHEXANE, GAMMA- 26 14 000058-89-9
94 PHENOL 26 14 000108-95-2
94 TCDD EQUIVALENTS 26 14 HZ0400-03-T
97 BORON 26 13 007440-42-8
98 STYRENE 25 11 000100-42-5
99 METHYL-T-BUTYL ETHER 25 9 001634-04-4
100 1,2-DICHLOROPROPANE 24 17 000078-87-5

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