The effects of fruit orchard farming and land application of wastewater on transport of pollutants to the Great Lakes were studied in two sub-studies. In the Mill Creek Study, movement of pesticides from fruit orchards was the primary concern. Only eight pesticides were transported in appreciable quantity. The major forms exported were the residual, presently unused, chlorinated hydrocarbons. Most pesticides were transported on suspended solids. Pesticides lost in order of amount lost were DDT, DDE, Atrazine, Dieldrin, DDD, Simazine, Aldrin, and Guthion. Most pesticides lost were associated with past farming practices or corn cultivation. Guthion was the only major pesticide lost associated with present fruit orchard farming practices. The Felton-Herron Creek Study demonstrated that improper management of land application systems for recycling municipal wastewater can lead to appreciable loading of streams with major nutrients, especially nitrogen. Proper management can control these losses. Perennial crops and oldfield systems are efficient at uptake of both N and P throughout the growing season and offer excellent wastewater renovation potential.

"U.S. Environmental Protection Agency, Region V." "This study was conducted as part of the Task C - Pilot Watershed Program for the International Reference Group on Pollution from Land Use Activities, Great Lakes Regional Office, International Joint Commission." Includes bibliographical references. "Grant number R005143-01." "EPA-905/9-78-002."