Court upholds stricter selenium standards for Lake Koocanusa

By: Micah Drew

Outlets: Daily Montanan

Published: April 10, 2026

Words: 942

Last Updated: 3 months, 3 weeks ago

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A Montana District Court this week upheld a 2020 state water quality standard for selenium in Lake Koocanusa, dismissing a rule enacted by the state Board of Environmental Review that sought to weaken the standard in 2022.

In the order, Lewis and Clark District Judge Kathy Seeley found that the board no longer has rulemaking authority, which instead resides with the Department of Environmental Quality, and favored the state and a coalition of conservation organizations …

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