USGS Scientific Investigations Report 2009–5119Reconnaissance of Pharmaceutical Chemicals in  Urban Streams of the Tualatin River Basin,  Oregon, 2002

Table 5. Detection frequency for pharmaceutical chemicals analyzed in this study.

[Grey shading highlights combinations with no detections. WWTF, wastewater treatment facility]

Compound	Detection frequency (detections/number of samples)
Compound	All streams	Urban streams	Forested streams	Agricultural streams	Tualatin River	WWTF
Acetaminophen	3/10	2/6	1/1	0/1	0/2	1/4
Albuterol (Salbutamol)	0/10	0/6	0/1	0/1	0/2	0/4
Caffeine	7/10	6/6	0/1	1/1	0/2	1/4
Carbamazepine	3/10	0/6	1/1	0/1	2/2	4/4
Cimetidine	0/10	0/6	0/1	0/1	0/2	1/4
Codeine	2/10	0/6	0/1	0/1	2/2	1/4
Cotinine	8/10	6/6	0/1	0/1	2/2	4/4
Dehydronifedipine	0/10	0/6	0/1	0/1	0/2	0/4
Diltiazem	0/10	0/6	0/1	0/1	0/2	2/4
1,7-Dimethylxanthine	0/10	0/6	0/1	0/1	0/2	1/4
Diphenhydramine	0/10	0/6	0/1	0/1	0/2	1/4
Fluoxetine	0/10	0/6	0/1	0/1	0/2	1/4
Gemfibrozil	0/10	0/6	0/1	0/1	0/2	0/4
Ibuprofen	0/10	0/6	0/1	0/1	0/2	2/4
Metformin	0/10	0/6	0/1	0/1	0/2	2/4
Miconazole	0/10	0/6	0/1	0/1	0/2	0/4
Ranitidine	0/10	0/6	0/1	0/1	0/2	1/4
Sulfamethoxazole	2/10	0/6	0/1	0/1	2/2	3/4
Thiabendazole	0/10	0/6	0/1	0/1	0/2	0/4
Trimethoprim	0/10	0/6	0/1	0/1	0/2	1/4
Warfarin	0/10	0/6	0/1	0/1	0/2	0/4