Study Finds High Levels Of Mercury In Snake River’s Smallmouth Bass In Reservoirs Compared To Free-Flowing Stretches

Mercury concentrations are twice as high in smallmouth bass found in reservoirs than those in the free-flowing sections of the Snake River in Idaho and Oregon, according to a joint U.S. Geological Survey and Idaho Power Company study that looked at 1,815 specimens of this popular recreational fishing species from a variety of habitats in 31 sites along 530 miles of the Snake River.

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