Troy officials called on to support new selenium standards
Kootenai River between Libby and Lake Koocanusa. (File photo)
State environmental regulators have approved new standards for levels of a heavy metal that has leached into Lake Koocanusa and the Kootenai River from upstream Canadian mines.
The Montana Board of Environmental Review voted in favor of tightening accepted concentrations of selenium for the river and reservoir during a Dec...
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