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Pesticides in Milk and Milk Products—Public Health Implications

Pet Milk Company, St. Louis, Missouri

ABSTRACT

Reports from the Technical Advisory Committee for the Dairy Industry on pesticides, working under the aegis of the Dairy Industry Committee, indicate that progress is being made on the reduction of levels (not incidence) of contamination of milk and milk products during the past several years. This has been brought about through active educational and enforcement programs by federal and state regulatory agencies, together with educational efforts directed to dairymen and processors by the industry itself. Analytical data representing large geographical coverage of the United States show that over the past 5 yr average levels of the ubiquitous DDT and analogues have been reduced from 1.5 ppm to currently about 0.5 ppm, fat basis. There is evidence of continuing contamination at lower levels of Methoxychlor or Lindane or both—these two compounds being not readily distinguishable by paper chromatography.

Newer methodology, such as gas chromatography with electron capture, which apparently is becoming the method of choice is, however, revealing heretofore unknown incidence of Dieldrin and Heptachlor in milk and milk products, the occurrence of the latter being endemic, depending upon local feeding practices.