All the fish caught in the nearly 300 streams tested by the United States Geological Survey were found to contain some level of mercury, according to a new USGS study. The wild-caught fish with the highest mercury levels are smallmouth, largemouth, and spotted bass. The lowest amounts were found in brown, rainbow-cutthroat trout, and channel catfish.
Most of the mercury is from coal-fired power plants.
Learn more Facts on Fish.
Most of the mercury is from coal-fired power plants.
Learn more Facts on Fish.
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