Water-quality data were collected from 147 rivers and streams during 1989-90 to assess selected preemergent herbicides, two atrazine metabolites, and nitrate in 10 Midwestern States. This report includes a description of the sampling design, data collection techniques, laboratory and analytical methods, and a compilation of constituent concentrations and quality-assurance data. All water samples w
Authors
E.A. Scribner, E.M. Thurman, D. A. Goolsby, M. T. Meyer, M. S. Mills, M.L. Pomes