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 19. Currently used pesticides and degradates detected in filtered stormwater runoff, Columbia River Basin, Washington and Oregon, 2009–10. 

[Station names are shown in table 3. 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. Abbreviations: E, estimated; –, not detected; sometimes the reporting limit for an individual sample was raised because of matrix interference, these instances of non-detection are shown as less than (<) the raised reporting limit] 

Analyte	Wenatchee	Richland	Umatilla	The Dalles	Hood River	Portland1	Vancouver1	Vancouver2	Portland2	Willamette1	Willamette2		Willamette3	Willamette4	St. Helens	Longview
Analyte	Wenatchee	Richland	Umatilla	The Dalles	Hood River	Portland1	Vancouver1	Vancouver2	Portland2	Willamette1	–Dec	–May	Willamette3	Willamette4	St. Helens	Longview
Fungicides
Metalaxyl	–	–	<0.013	–	–	<0.042	<0.014	<0.021	–	<0.0149	<0.020	–	E 0.017	–	–	–
Myclobutanil	0.097	–	–	–	–	–	–	–	<0.040	–	–	–	–	–	–	–
cis-Propiconazole	E 0.059	–	–	–	–	–	<0.019	<0.023	–	E 0.024	<0.056	E 0.055	<0.024	E 0.015	–	E 0.030
trans-Propiconazole	E 0.069	–	–	E 0.016	–	–	<0.022	–	–	E 0.038	<0.053	E 0.069	–	E 0.018	–	E 0.043
Tebuconazole	0.076	–	–	–	–	–	–	–	–	<0.0362	<0.064	0.081	–	–	–	–
Herbicides and degradates
Atrazine	–	0.022	–	–	–	0.038	<0.009	<0.008	–	0.011	<0.016	0.032	<0.008	–	–	–
4-Chloro-2-methylphenol¹	–	<0.007	<0.004	–	–	–	–	–	–	–	E 0.322	E 1.1	E 0.008	–	–	–
DCPA (Dacthal)	Present	0.032	0.027	Present	Present	Present	–	–	–	Present	–	Present	–	Present	–	–
3,4-Dichloroaniline¹	–	–	E 0.010	E 0.073	–	<0.008	–	–	–	–	–	–	–	–	–	–
EPTC	–	0.029	E 0.005	–	–	–	–	<0.003	–	–	–	–	–	–	–	–
Hexazinone	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	0.021
Metolachlor	–	0.026	E 0.013	–	–	E 0.024	–	–	0.021	E 0.011	–	–	–	E 0.009	–	–
Pendimethalin	–	–	0.027	–	–	E 0.028	0.10	0.16	0.032	0.032	<0.043	–	–	–	–	–
Simazine	<0.035	–	–	0.10	–	0.063	<0.008	0.14	–	0.051	0.058	0.046	<0.008	0.036	–	0.025
Tebuthiuron	–	–	–	0.22	–	<0.042	–	–	–	–	0.17	0.62	0.056	0.12	0.054	0.11
Trifluralin	–	–	–	–	–	–	Present	–	–	Present	E 0.012	E 0.013	–	–	–	–
Insecticides and degradates
Carbaryl	E 0.13	E 0.20	Present	–	–	E 0.038	Present	–	–	–	E 0.37	E 0.38	–	Present	–	Present
Chlorpyrifos	–	–	<0.018	–	–	E 0.062	–	<0.016	<0.016	–	E 0.017	–	–	–	–	–
Desulfinylfipronil¹	–	–	–	–	E 0.007	Present	Present	Present	–	Present	Present	–	–	–	–	–
Diazinon	0.13	<0.010	<0.018	–	–	<0.024	<0.005	–	–	< 0.007	0.072	0.78	–	–	–	–
Fipronil	–	–	Present	–	Present	–	Present	–	–	–	E 0.014	E 0.049	–	–	–	–
Malathion	–	–	–	–	–	–	–	–	–	–	0.50	1.3	–	–	–	–
Other compounds
Ethoprop	–	–	<0.083	–	–	2.9	–	–	<0.019	< 0.020	–	–	–	–	–	–
1-Naphthol¹	–	E 0.026	Present	–	–	–	Present	E 0.016	Present	–	E 0.030	E 0.056	–	–	–	–

¹ Degradate.

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 