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| Title | Concentrations of 303(d) Listed Metals in the Upper Yakima River | |||
| Month-Year Published | June 2000 | |||
| Online Availability |
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| Short Description |
Copper, cadmium, mercury, and silver were analyzed in the Yakima River at Cle Elum and at Umtanum to verify 303(d) listings for violations of state water quality standards, based on historical U.S. Geological Survey data. Zinc and lead were also analyzed. Water sampling included three tributaries -- Crystal, Swauk, and Wilson Creeks -- considered to be potential metals sources to the river. (Also see abstract below) | |||
| Publication Number | 00-03-024 | |||
| Author(s) | Johnson, A. | |||
| Print Availability | ||||
| Number of pages | 38 pp. | |||
| Keywords | copper, creek, lead, metals, results, river, survey, toxic, water, zinc | |||
| Subject Waterbodies |
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| Abstract | Long Description |
Copper, cadmium, mercury, and silver were analyzed in the Yakima River at Cle Elum and at Umtanum to verify 303(d) listings for violations of state water quality standards, based on historical U.S. Geological Survey data. Zinc and lead were also analyzed. Water sampling included three tributaries -- Crystal, Swauk, and Wilson Creeks -- considered to be potential metals sources to the river. Results showed metals concentrations were generally low. Zinc and copper were routinely detected at all locations in concentrations ranging from <0.4 - 2.1 ug/L and 0.12 - 2.3 ug/L, respectively. In the main stem, there was a significant downstream increase in copper, partly attributable to Wilson Creek. Lead, cadmium, and mercury were less frequently detected and almost exclusively limited to the three tributaries. All samples analyzed were well within state standards for aquatic toxicity. It is recommended that the upper Yakima River be removed from the 303(d) list for historically reported metals violations in the water column. |
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