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Top 20 Hazardous Substances from the CERCLA Priority List of Hazardous Substances for 2003 What is the Top 20 List?The list below contains the Top 20 hazardous substances on the CERCLA Priority List of Hazardous Substances for 2003. The complete list of 275 substances is obtained from an annual evaluation fulfilling the conditions of CERCLA section 104 (i), as amended, which requires ATSDR and EPA to revise the Priority List of Hazardous Substances periodically to include additional hazardous substances.Further information about the evaluation process and the complete set
of 275 substances on the current list can be accessed online at:
Each of the Top 20 substances listed below is identified with their 2003 Rank Number and includes a link to an ATSDR publication, the ToxFAQsTM Sheet, which has further health and chemical information about that substance. The ATSDR Division of Toxicology has prepared several sets of publications that provide answers to many health concerns that are voiced by community groups and give general information on various properties of each of these substances. Those publications are listed and may be accessed online at: Top 20 Hazardous Substances
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1 | ARSENIC |
2 | LEAD |
3 | MERCURY |
4 | VINYL CHLORIDE |
5 | POLYCHLORINATED BIPHENYLS |
6 | BENZENE |
7 | CADMIUM |
8 | POLYCYCLIC AROMATIC HYDROCARBONS |
9 | BENZO(A)PYRENE |
10 | BENZO(B)FLUORANTHENE |
11 | CHLOROFORM |
12 | DDT, P,P'- |
13 | AROCLOR 1254 |
14 | AROCLOR 1260 |
15 | DIBENZO(A,H)ANTHRACENE |
16 | TRICHLOROETHYLENE |
17 | CHROMIUM, HEXAVALENT |
18 | DIELDRIN |
19 | PHOSPHORUS, WHITE |
20 | CHLORDANE |
Further information can be obtained by contacting the ATSDR Information Center at:
ATSDR Information Center / ATSDRIC@cdc.gov / 1-888-422-8737
This page was updated on November 19, 2003
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