Mercury in lakes and rivers is converted into methyl mercury by certain bacteria. Fish ingest methyl mercury by swimming or feeding in contaminated water. Methyl mercury accumulates in fish tissue and is carried up the food chain to larger fish, animals and humans. Methyl mercury is dangerous because the concentration of methyl mercury increases as it goes up the food chain.”.....
What we do know is that shortly after EPA fined Barrick, it turned its attention on Nevada Division of Environmental Protection. EPA called on the state agency to list an additional 19 streams, lakes, rivers,including Ruby and Comins Lakes, the Owyhee River, Wildhorse and South Fork Reservoirs to the methyl mercury fish warning list.
http://www.planevada.org/minings-toxic-legacy/
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