Historical detections of four corn herbicides in ground water compared to relative ground water vulnerability (alachlor, atrazine, metolachlor, and simazine). Data are from UNL Conservation Services Division (CSD) (1999) and UNL (2000).
UNL Conservation and Survey Division. 1999. Pesticides and Groundwater: An Applicator's Map and Guide to Prevent Groundwater Contamination.University of Nebraska-Lincoln. 2000. Quality-assessed Agrichemical Contaminant Database for Nebraska Groundwater. A cooperative project of the Nebraska Departments of Agriculture, Environmental Quality, and Natural Resources and the University of Nebraska - Lincoln (UNL), updated September 2013.