HELENA, Mont. — A Republican lawmaker from Libby on Wednesday spoke on behalf of a bill that seeks to strike the existing water quality standard for selenium in Lake Koocanusa and double the limit.

Environmental groups in Montana and Idaho are defending a water quality standard Montana adopted in 2020 by suing a quasi-judicial board that’s spent the past year trying to invalidate it. The lawsuit ...

A petition submitted by Lincoln County commissioners to ease selenium standards in Lake Koocanusa met resistance at a public meeting held by the Montana Department of Environmental Quality on ...

KALISPELL, Mont. (AP) - Following years of rigorous scientific study by a multitude of state and federal agencies, Montana environmental regulators adopted a new water quality standard aimed at ...