PESTICIDE RESIDUES IN SELECTED DRINKING WATER SUPPLIES IN SWEDEN

EVA SANDBERG

In order to study the possible contamination of drinking water supplies with pesticides, the National Food Administration carried out an invesrigarion in 33 water supplies during 1992-94. Sampling was done both in surface and ground warer supplies. Pesticide residues were found in three ground water supplies on all seven occasions and in one surface water supply in two out of seven occasions. No pesticide residues were detected in any ofthe other supplies in this investigation. The pesticides found in the ground water supplies were atrazine, its metabolite desethylarrazine, and the dichlobenil degradation product 2,6-dichlorobenzamide.