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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 22. Trace elements detected in stormwater runoff, Columbia River Basin, Washington and Oregon, 2009–10.


[Station names are shown in table 3. Concentrations are in micrograms per liter. See table A6 for a listing of trace-element compounds analyzed and their reporting limits. Present, presence is verified, but concentration is not quantified. Abbreviation: E, estimated; –, not detected]


Analyte Wenatchee Richland Umatilla The Dalles Hood River Portland1 Vancouver1 Vancouver2 Portland2 Willamette1 Willamette2 Willamette3 Willamette4 St. Helens Longview
–Dec –May
Unfiltered water
Arsenic 0.87 2.6 2.3 2.1 Present 0.98 0.64 0.49 0.42 1.1 2.5 2.1 1.8 0.97 0.25 1.7
Cadmium 0.08 0.50 0.57 0.13 0.21 0.10 0.11 0.17 0.77 0.65 0.08 0.15 Present E 0.04
Chromium 0.71 0.60 9.0 2.1 2.5 6.8 2.9 1.3 2.4 4.7 2.8 4.7 33 Present 0.64
Copper 9.6 6.3 42 7.6 Present 20 15 7.8 12 16 22 15 9.3 12 2.2 3.1
Lead 2.2 0.76 19 1.2 Present 5.8 21 13 3.6 3.2 53 24 5.0 5.7 0.62 1.3
Mercury 0.09 E 0.01 0.01 E 0.01 E 0.01 0.18 0.07 0.02 0.01
Nickel 1.1 1.5 22 2.4 0.23 2.2 2.2 1.2 1.2 2.3 4.3 4.0 3.5 3.3 0.63 0.90
Selenium 0.73 0.13 0.20 Present 0.33 0.25 E 0.10 Present
Silver 0.13 0.018 0.019 0.018 Present Present 0.25 0.078 0.020 0.023
Zinc 87 17 160 27 7.5 50 93 34 73 150 190 150 28 250 11 28
Filtered water
Arsenic 0.69 2.3 0.42 2.0 0.13 0.73 0.26 0.37 0.26 0.43 1.1 1.4 0.31 0.56 0.14 0.80
Cadmium 0.08 0.05 0.03 0.6 E 0.02 0.07 0.07 0.07 0.08 0.14 0.25 0.48 Present 0.05 E 0.02 0.02
Chromium Present Present Present 1.1 Present 1.0 1.6 2.1 0.50 0.68 0.62 Present Present Present Present Present
Copper 9.2 4.5 5.4 7.6 4.6 11 5 7.4 7.8 8.3 5.2 2.6 3.4 1.8 1.9 E 1.0
Lead 0.32 0.19 0.12 0.16 0.11 0.59 0.31 12 0.47 0.18 2.9 2 0.08 0.10 0.08 0.03
Mercury 0.01
Nickel 1.3 0.89 1.4 1.5 0.23 1.1 0.71 0.98 0.86 1.6 1.9 3.2 0.98 1.0 0.70 0.50
Selenium 0.05 0.61 E 0.04 0.20 Present E 0.04 Present Present 0.05 0.34 0.21 0.06 0.05 Present Present
Silver 0.02 E 0.01 0.01
Zinc 85 12 17 32 7.7 28 39 7.7 60 100 57 47 E 4.5 87 11 18

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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