Herbicides in streams. Midwestern United States

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Results from a 2-year study of 149 streams geographically distributed across the corn-producing region of 10 midwestern States show that detectable concentrations of herbicides persist year round in most streams. Some herbicides exceeded proposed maximum contaminant levels for drinking water for periods of several weeks to several months following application. Atrazine was the most frequently detected and most persistent herbicide measured, followed by desethylatrazine and metolachlor. The seasonal distribution of atrazine indicates that aquifers contributing base flow to many of the streams are contaminated with herbicides.
Publication type Conference Paper
Publication Subtype Conference Paper
Title Herbicides in streams. Midwestern United States
ISBN 0872628116
Year Published 1991
Language English
Publisher Publ by ASCE
Publisher location New York, NY, United States
First page 17
Last page 23
Conference Title Proceedings of the 1991 National Conference on Irrigation and Drainage
Conference Location Honolulu, HI, USA
Conference Date 22 July 1991 through 26 July 1991
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