Echo
Great Lakes fish eaters less contaminated than a decade ago
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Anglers who ate Great Lakes fish have 33 percent fewer PCBs and 43 percent less DDT in their bodies than they did a decade ago, largely because they changed their diet and switched to less contaminated fish, according to a study by Wisconsin researchers. The scientists compared blood drawn from people in 1994-1995 with blood from the same people drawn roughly nine years later. Most of the 293 men and women tested were sports fishers and boat captains who consumed large amounts of Great Lakes fish. One reason for the decline “is that your body excretes these chemicals over time as they slowly get metabolized,” said Lynda Knobeloch, study leader and senior toxicologist at the Wisconsin Department of Health Services. “The other is that exposure levels are much, much lower than what they were 30 years ago.”
Polychlorinated biphenyls, or PCBs—industrial compounds used largely to insulate electrical transformers—and the pesticide DDT were banned in the United States in the 1970s.