A monitoring project was initiated in 1990 aimed at investigating pesticide sources, pathwaysand occurrence in stream water within an agricultural catchment. The work was carried out inclose co-operation with the farmers operating in the selected area. Since 1995, farmers in thecatchment have received extensive information regarding best management practises forpesticides adapted to local conditions on the farm. The program has continued during theentire 1990's. The results demonstrate a considerable reduction in overall pesticide findings inthe stream, with concentrations down by more than 90%. The most notable decrease inconcentration levels and transported amounts occurred in 1995, coinciding with the onset ofthe site specific information efforts. The decreasing levels of pesticides in stream water fromthe catchment area can primarily be attributed to an increased awareness amongst the farmerson better routines for the correct handling of spraying equipment and application procedures,including the practice of total weed killing on farmyards.