Waterkeeper petitions DEQ again to list Big Hole as impaired

By: Jordan Hansen

Outlets: Daily Montanan

Published: January 26, 2026

Words: 701

Last Updated: 3 weeks, 3 days ago

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Upper Missouri Waterkeeper is again petitioning the Montana Department of Environmental Quality to list the Big Hole River as impaired in a letter submitted earlier this month.

The letter was submitted as a comment to the agency’s 2022-24 Draft Water Quality Integrated Report, which is a federally required process to determine where waterways are unhealthy and outline what’s being done about it.

While the Big Hole is not currently listed as “impaired,” other waterways in …

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