ABSTRACT
This chapter discusses three main categories: national and multistate monitoring studies, state and local monitoring studies and process and matrix distribution studies. Included are studies of pesticide runoff from field plots, investigations of surface waters to which pesticides have been applied directly for pest control, studies of forest streams immediately after aerial applications of pesticides, and so forth. Most of these studies involved relatively specialized sampling at one or several sites for several days, weeks, or months. Study designs ranged from monitoring a single pesticide at a single site to regional studies of multiple pesticide classes. Iowa, California, Florida, and the Great Lakes had the greatest number of reviewed studies. The reviewed studies span scales from a few hectares to the entire nation. A major problem in comparing results from different studies is dealing with unknown or variable detection limits.
