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Fact Sheet 2011–3011

Prepared in cooperation with Wyoming Department of Agriculture

Pesticides in Wyoming’s Rivers, 2006–10

By Cheryl A. Eddy-Miller

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In 2006, the U.S. Geological Survey completed a study in cooperation with the Wyoming Department of Agriculture to determine the occurrence of pesticides in four major rivers within the Bighorn and North Platte River Basins in Wyoming. Surface-water samples were collected at five sites during three different times of the year and detectable concentrations of pesticides were measured in samples collected during all three sampling events. In 2009–10, the USGS, in cooperation with the WDA, resampled three of the sites from the 2006 study and three additional sites located in areas of interest to the State of Wyoming to further describe the occurrence of pesticides in Wyoming’s rivers. The change was made in order to include sites located near cities and towns. Results from the 2009–10 sampling along with comparisons to data collected in 2006 are presented in this fact sheet.

First posted February 28, 2011

For additional information contact:

USGS Wyoming Water Science Center
2617 E. Lincolnway, Suite B
Cheyenne, WY 82001

http://wy.water.usgs.gov/

Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge.


Suggested citation:

Eddy-Miller, C.A., 2011, Pesticides in Wyoming’s rivers, 2006–10: U.S. Geological Survey Fact Sheet 2011–3011, 4 p.


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