Skip Links

USGS - science for a changing world

Scientific Investigations Report 2012–5068


Reconnaissance of Contaminants in Selected Wastewater-Treatment-Plant Effluent and Stormwater Runoff Entering the Columbia River, Columbia River Basin, Washington and Oregon, 2008–10


Table 14. Currently used pesticides and degradates detected in filtered wastewater-treatment-plant effluent, Columbia River Basin, Washington and Oregon, December 2009.


[Station names are shown in table 2. Concentrations reported in micrograms per liter. See table A4 for a listing of pesticides analyzed and their reporting limits. Present, presence is verified, but concentration is not quantified; sometimes the reporting limit for an individual sample is raised because of matrix interference, these instances of non-detection are shown as less than (<) the raised reporting limit. Abbreviations: E, estimated; –, not detected]


Analyte Wenachee Richland Umatilla The Dalles Hood River Portland Vancouver St. Helens Longview
Fungicides
cis-Propiconazole E 2.8
trans-Propiconazole E 6.9
Herbicides and degradates
Atrazine Present < 0.0095 Present
3,4-Dichloroaniline1 E 0.034 E 0.056 E 0.052 E 0.12 E 0.021 < 0.065 E 0.28 E 0.034 E 0.13
Metolachlor E 0.012
Prometon Present Present
Simazine E 0.005
Insecticides and degradates
Carbaryl E 0.092 Present
Desulfinylfipronil1 Present Present Present Present Present Present Present
Fipronil E 0.027 Present E 0.042 E 0.056 E 0.078 E 0.087 < 0.047 E 0.13
Fipronil sulfide1 Present Present Present Present Present Present 0.022 E 0.006
Fipronil sulfone1 Present Present Present 0.024
Other compounds
1-Naphthol1 Present Present

1Degradate.

First posted April 25, 2012

For additional information contact:
Director, Oregon Water Science Center
U.S. Geological Survey
2130 SW 5th Avenue
Portland, Oregon 97201
http://or.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.

Accessibility FOIA Privacy Policies and Notices

USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/sir/2012/5068/table14.html
Page Contact Information: Contact USGS
Page Last Modified: Thursday, January 10, 2013, 07:51:17 PM