Trace-element concentrations in water, streambed sediment, and aquatic invertebrates at select locations in the Klamath River and major tributaries, 2018-2019.
The U.S. Geological Survey is monitoring concentrations of metals and other trace elements in water, streambed sediment, and aquatic invertebrates at 6 locations in the middle and lower portions of the mainstem Klamath River from below J.C. Boyle dam in Oregon to near the mouth on the northwestern coast of California. …