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Pesticide Residues in the Woodland Surficial Aquifer, Pesticide Report #6

Publication number Date Published
94-128August 1994
VIEW NOW Pesticide Residues in the Woodland Surficial Aquifer, Pesticide Report #6 (Number of pages: 33) (Publication Size: 2MB)

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Author(s) Larson, A.
Description Fourteen wells near Woodland, Washington, were sampled during May and June 1993 for 124 pesticides and nitrate+nitrite as nitrogen. Field measurements of water temperature, pH, and specific conductance were also made. Seven pesticides were detected in the initial samples; atrazine, simazine, diuron, bromacil, tebuthiuron, pentachlorophenol, and 1,2dichloropropane. One or more of these chemicals were detected in nine wells, however, concentrations were below health related levels set by the EPA. A second sample from the nine wells confirmed the presence of these pesticides. In one well, the nitrate+nitrite as N concentration exceeded the 10 mg/L standard for public drinking water.
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Keywords Woodland, specific conductance, drinking water, nitrogen, report, pesticides, wells, temperature, water, chemical, wood, pesticide, pH, nitrate, nitrite, groundwater, aquifer
WEB PAGE Groundwater quality assessment
WATERSHED Water Resource Inventory Area 27 Lewis
DATA Environmental Information Management (EIM) #WOODLAND