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Scientific Investigations Report 2009–5119

Reconnaissance of Pharmaceutical Chemicals in Urban Streams of the Tualatin River Basin, Oregon, 2002

Table 6. Apparent removal rates of pharmaceutical compounds from wastewater by the Durham WWTF.

[Results are shown only for the 14 target compounds detected and quantified in Durham WWTF influent. If a compound was not detected in WWTF effluent, the method detection limit was used to compute the apparent removal rate; such instances are denoted with an asterisk (*). >, greater than; 
%, percent; WWTF, wastewater treatment facility]

Compound Apparent removal Compound Apparent removal
Acetaminophen > 99%* 1,7-Dimethylxanthine > 99%*
Caffeine > 99%* Diphenhydramine > 98%*
Carbamazepine 18% Fluoxetine > 82%*
Cimetidine > 97%* Ibuprofen > 77%
Codeine > 98%* Ranitidine > 98%*
Cotinine 97% Sulfamethoxazole 84%
Diltiazem > 92%* Trimethoprim > 94%*
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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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