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Wyoming-Montana Water Science Center

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ABOUT THE WYOMING-MONTANA WSC

USGS IN YOUR STATE

USGS Water Science Centers are located in each state.

There is a USGS Water Science Center office in each State. Washington Oregon California Idaho Nevada Montana Wyoming Utah Colorado Arizona New Mexico North Dakota South Dakota Nebraska Kansas Oklahoma Texas Minnesota Iowa Missouri Arkansas Louisiana Wisconsin Illinois Mississippi Michigan Indiana Ohio Kentucky Tennessee Alabama Pennsylvania West Virginia Georgia Florida Caribbean Alaska Hawaii New York Vermont New Hampshire Maine Massachusetts South Carolina North Carolina Rhode Island Virginia Connecticut New Jersey Maryland-Delaware-D.C.
Prepared in cooperation with the Wyoming Department of Agriculture (WDA)

 


 

Monitoring for Pesticides in Wyoming's Water

Since 1995, the U.S. Geological Survey, in cooperation with the Wyoming Department of Agriculture, has been sampling groundwater in Wyoming. Sampling of surface water for pesticides began in 2006.

Groundwater:

In 1995, the groundwater sampling for pesticides began. Since then, over 700 samples have been collected.  The latest report was published in April 2013 (http://pubs.usgs.gov/sir/2013/5064/). Results show:

  1. All detected concentrations of pesticides were less than the associated drinking-water standard.
  2. Pesticides have been detected in every county.
  3. Most detected pesticides were herbicides or herbicide degradates.
  4. Wells in an urban setting were more likely to have pesticide detections than wells in agricultural, undeveloped, or mixed use settings.
  5. Over time, the concentrations of pesticides detected are decreasing in the groundwater
  6. Over time, the specific pesticides detected are changing, but the number of different pesticides detected are about the same.

 

Surface water:

Samples for pesticide analysis have been collected from rivers and streams around the State since 2006.  The latest publication is a fact sheet describing the results of the 2009-10 sampling can be found at: http://pubs.er.usgs.gov/publication/fs20113011. Results show:

  1. All detected concentrations of pesticides were much less than the associated drinking-water standard.
  2. Pesticide concentrations and detections in Wyoming were not dependent on the amount of flow in the river.
  3. Most detected pesticides were herbicides or herbicide degradates.
  4. The most commonly detected pesticide or degradate in 2009 and 2010 was the degradate of glyphosate, which was found in 75 percent of all samples.

 

For more information, contact:


Cheryl Eddy Miller
USGS Project Manager
521 Progress Circle, Suite 6
Cheyenne, Wyoming 82007
(307) 775-9167
Email: cemiller@usgs.gov

Hank Uhden
Wyoming Department of Agriculture
2219 Carey Avenue
Cheyenne, Wyoming 82002
(307) 777-6574

Funding for the project is provided by the Wyoming Department of Agriculture, the U.S. Geological Survey, and an EPA Section 319 grant administered by the Wyoming Department of Environmental Quality Non-Point Source Program.

Wyoming Water Science Center

 

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Page Last Modified: Monday, 10-Feb-2014 12:07:13 EST