USGS Scientific Invesigations 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

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.

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

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