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 16. Percentage of compounds detected in each wastewater-treatment plant sampled, Columbia River Basin, Washington and Oregon, 2008–09. 

[Station names are shown in table 2]  

Compound class	Total number analyzed	Wenatchee	Richland	Umatilla	The Dalles	Hood River	Portland			Vancouver	St. Helens	Longview
Compound class	Total number analyzed	Wenatchee	Richland	Umatilla	The Dalles	Hood River	(a.m.)	(noon)	(p.m.)	Vancouver	St. Helens	Longview
Detergent metabolites	8	50	38	0	50	50	63	63	63	38	63	63
Flame retardants	17	82	76	76	82	82	82	82	82	82	82	65
Miscellaneous	17	47	24	29	35	24	35	35	47	24	35	53
Personal care products	15	60	33	47	47	53	47	53	47	40	53	80
Pesticides	104	12	12	18	15	13	9	13	9	16	13	15
Plasticizers	4	100	50	25	50	25	25	75	50	50	100	100
Polycyclic aromatic hydrocarbons (PAHs)	9	0	11	0	11	0	11	11	11	0	22	44
Steroids	4	100	100	75	75	75	75	75	75	75	100	100
Pharmaceuticals	14	43	29	36	36	43	43	36	43	43	50	57
Polychlorinated biphenyls (PCBs)	18	44	0	0	0	0	0	0	0	0	6	11
Overall	210	37	25	28	33	29	29	32	30	30	33	40