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The occurrence, movement, flux, fate, and effects of agricultural chemicals in the U.S. are studied by the U.S. Geological Survey's Research on Pesticides in the Environment (RPE) group. Project researchers are identifying the sources of agricultural chemicals (insecticides, herbicides, fungicides, fertilizers, and others) to the environment and the factors that affect their dispersal from point of application to groundwater, small streams, large rivers, reservoirs, precipitation, and the atmosphere. The overall goal of this research is to collect and synthesize agricultural chemical related water-quality information to help resource managers, policy makers, and the public develop agricultural management practices that protect the region's water resources. This project is part of the U.S. Geological Survey's Toxic Substances Hydrology program, the activities of which are described in a 2000 USGS fact sheet.

Map of Midcontinent Herbicide Project

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Pesticides in Midwestern Rivers, 1989-2002

  • Pesticide Concentration Data
  • Agricultural Chemical GIS Data

Herbicides and their Degradates in Ground Water

Texas Source-Water Susceptibility Assessment

Glyphosate Reconnaissance, 2002


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