Dissolved pesticides, dissolved organic carbon, and water-quality characteristics in selected Idaho streams, April--December 2010

Reilly, Timothy J.; Smalling, Kelly L.; Wilson, Emma R.; Battaglin, William A.

Abstract:

Water-quality samples were collected from April through December 2010 from four streams in Idaho and analyzed for a suite of pesticides, including fungicides, by the U.S. Geological Survey. Water samples were collected from two agricultural and two nonagricultural (control) streams approximately biweekly from the beginning of the growing season (April) through the end of the calendar year (December). Samples were analyzed for 90 pesticides using gas chromatography/mass spectrometry. Twenty-three pesticides, including 8 fungicides, 10 herbicides, 3 insecticides, and 2 pesticide degradates, were detected in 45 water samples. The most frequently detected compounds in the two agricultural streams and their detection frequencies were metolachlor, 96 percent; azoxystrobin, 79 percent; boscalid, 79 percent; atrazine, 46 percent; pendimethalin, 33 percent; and trifluralin, 33 percent. Dissolved-pesticide concentrations ranged from below instrumental limits of detection (0.5-1.0 nanograms per liter) to 771 nanograms per liter (hexazinone). The total number of pesticides detected in any given water sample ranged from 0 to 11. Only three pesticides (atrazine, fipronil, and simazine) were detected in samples from the control streams during the sampling period.

Genre:

USGS Numbered Series

ProdID:

70038407

Citation Author:

Reilly, Timothy J. ; Smalling, Kelly L. ; Wilson, Emma R. ; Battaglin, William A.

Citation Contributing Office:

New Jersey Water Science Center

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Citation Language:

English

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Citation LatN:

0440000

Citation LatS:

0430000

Citation LonE:

-1160000

Citation LonW:

-1170000

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Citation Phsyical Description:

vii, 17 p.

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Citation Public Comments:

Toxic Substances Hydrology Program

Citation Publisher:

U.S. Geological Survey

Citation Series:

Data Series

Citation Series Code:

Citation Series Number:

667

Citation Search Results Text:

Dissolved pesticides, dissolved organic carbon, and water-quality characteristics in selected Idaho streams, April--December 2010; 2012; DS; 667; Reilly, Timothy J. ; Smalling, Kelly L. ; Wilson, Emma R. ; Battaglin, William A.