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In 1998, our scientists conducted the following assessments at six sites in the Spokane River, two of which were USGS Northern Rockies National Water Quality Assessment Program sampling sites:
The State of Washington continues to use this baseline study to assess risks related to ecological and human health.
In general, the lack of variety and overall numbers of macroinvertebrates and fish species indicate impaired water quality. Please refer to the report below for more information.
MacCoy, D.E., Maret, T.R. 1997, Ecological indicators of water quality in the Spokane River, Idaho and Washington, 1998 and 1999: U.S. Geological Survey Water Fact Sheet 06-703, 8 p.
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