Recovery, separation, and identification of organic pesticides from natural and potable waters.

Organic pesticides have been reported in drinking, recreational, irrigational, fish, and shellfish waters of the United States wherefrom the evidence was obtained mostly from physiological responses of aquatic organisms. More recently, however, direct analyses by gas-liquid chromatography indicate that most surface waters and some ground waters contain trace amounts of organic pesticides. Consequently, these raw water supplies may have to be monitored in order to avoid adverse effects from their ultimate domestic use as drinking water. These treated waters would have to be monitored, therefore, in order to evaluate effectivenss of removal processes. Adverse effects may arise also from ancillary uses of potable waters; namely, irrigation of lawns and shrubs and filling of home aquaria.