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Agricultural chemicals in Iowa's ground water, 1982-95: What are the trends?

Dana W. Koplin·George Hallberg·D. A. Sneck-Fahrer·Robert Libra
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Abstract

The Iowa Department of Natural Resources. Geological Survey Bureau: the University of Iowa Hygienic Laboratory; and the U.S. Geological Survey (USGS) have been working together to address this question. As part of the Iowa Ground-Water Monitoring Program (IGWM). water samples have been collected from selected Iowa municipal wells since 1982. An examination of this data identified two trends: (1) concentrations of atrazine in Iowa's ground water generally were decreasing over time, and (2) concentrations of metolachlor generally were increasing. Continuing ground-water sampling can determine if these trends represent long-term changes in chemical concentrations.

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90° N90° S · 180° W ← longitude → 180° E
Source-reported bounding extent: 40.375501° to 43.50055° latitude; -96.638621° to -90.140061° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

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Dana W. Koplin, George Hallberg, D. A. Sneck-Fahrer, Robert Libra. 1997. Agricultural chemicals in Iowa's ground water, 1982-95: What are the trends?. https://doi.org/10.3133/fs11697

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