The purpose of this report is to present an assessment of the water quality benefits of controlling the discharge from pesticide manufacturing facilities to surface waters and publicly-owned treatment works (POTWs). In this assessment, potential aquatic life and human health impacts of direct discharges on receiving stream water quality and of indirect discharges on POTWs and their receiving streams are projected at current, BAT and pretreatment levels by quantifying pollutant releases and by using stream modeling techniques.