Effects of herbicide usage on water quality of selected streams in Wyoming

Open-File Report 80-1110
Prepared in cooperation with the Wyoming Department of Agriculture
By:

Links

Abstract

During 1977 and 1978 the Wyoming Department of Agriculture, in conjunction with county weed and pest control districts, conducted a noxious-weed-control program in Wyoming. The herbicides primarily used were picloram, 2,4-D, and dicamba. The U.S. Geological Survey, in cooperation with the Wyoming Department of Agriculture, sampled and analyzed water from selected streams for these herbicides plus silvex; 2,4,5-T; and 2,4-DP.

This report contains data for samples collected during 1977 and 1978. The most commonly detected herbicides in water samples were 2,4-D with 41-percent nonzero values and picloram with 34.5-percent nonzero values. Herbicide occurrence in bottom-material samples was uncommon; dicamba was found with 9-percent nonzero values. The maximum herbicide concentration in water was 1.1 micrograms per liter of 2,4-D, and the maximum herbicide concentration in bottom material was 8.0 micrograms per kilogram of 2,4-D. Based on available toxicity data and water-quality criteria, these herbicide concentrations do not constitute dangerous or harmful concentrations to humans or to the environment.

Study Area

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Effects of herbicide usage on water quality of selected streams in Wyoming
Series title Open-File Report
Series number 80-1110
DOI 10.3133/ofr801110
Year Published 1980
Language English
Publisher U.S. Geological Survey
Publisher location Cheyenne, WY
Description Report: v, 17 p; Tables: 4 pages
Country United States
State Wyoming