Summary: Because the residues of most pesticides do not linger in the environment, officials at the Environmental Protection Agency (EPA) believe that most marketed foods do not contain unsafe levels of residues from canceled pesticides. However, the residues of a few long-canceled chlorinated pesticides continue to appear, especially in fish. An EPA study shows that for five canceled chlorinated pesticides, consumers of some fish may be exposed, over a lifetime, to health risks that exceed the agency's standard of negligible risk--under which the risk of an additional case of cancer does not exceed one in one million. EPA proposed lower action levels in 1991 for residues of the five canceled pesticides, but the Food and Drug Administration believed that EPA had not given enough weight to the residues' unavoidability. Although both agencies believe that the existing action levels should be lowered, neither has taken further steps to do so. EPA does not revoke a pesticide's tolerances at the same time it cancels the pesticide's registrations for food use. On average, the agency has taken more than six years to revoke the tolerances for canceled pesticides. The establishment of procedures linking revocation to cancellation would provide for more efficient revocation actions and would reduce the possibility that consumers might eat imported foods containing residues of pesticides that EPA no longer considers acceptable for use on food crops.
