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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 10. Pharmaceuticals detected in filtered wastewater-treatment-plant effluent, Columbia River Basin, Washington and Oregon, 2008–09.


[Station names are shown in table 2. Concentrations reported in micrograms per liter. See table A3 for a listing of pharmaceuticals analyzed in filtered-effluent samples and their reporting limits.
Present, presence is verified, but concentration is not quantified. Abbreviations: E, estimated; –, not detected]


Analyte Wenatchee Richland Umatilla The Dalles Hood River Portland Vancouver St. Helens Longview
(2008) (2009) (a.m.) (noon) (p.m.)
Acetaminophen E 2.6
Caffeine 0.22 E 1.3 0.65 2.2 E 12 E 30
Carbamazepine 0.1 0.098 0.052 0.12 0.047 0.077 E 0.030 E 0.023 E 0.028 E 0.037 Present E 0.052
Codeine 0.042 0.17 0.19 0.13 Present
Cotinine 0.098 0.071 0.15
Dehydronifedipine Present Present
Diltiazem E 0.089 Present E 0.047 E 0.042 E 0.056 Present Present E 0.043
1,7-Dimethylxanthine E 0.40 E 5.1
Diphenhydramine 0.090 0.059 E 0.025 Present 0.11 0.082 0.075 0.064 0.056 0.10 E 0.033 E 0.031
Sulfamethoxazole Present Present E 0.12 Present Present
Thiabendazole 0.22 0.57
Trimethoprim 0.15 0.19 0.10 0.11 0.12 0.089 0.079 0.076 0.073 E 0.020 0.072

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

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