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
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U.S. Department of the Interior |
U.S. Geological Survey