Mercury
PCBs
Chlordane
Dioxins
DDT
Other
number
1993
889
319
100
54
40
102
1994
1,100
390
105
63
40
100
1995
1,308
438
102
63
38
125
1996
1,677
617
103
60
32
na
1997
1,782
588
117
65
33
na
1998
1,931
679
104
59
34
na
1999
2,073
703
101
74
40
na
Source: U.S. Environmental Protection Agency, Office of Water. Update: National Listing of Fish and Wildlife Advisories (EPA, OW, Washington, DC, 2000).
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