The Gallatin River has an algae problem. Researchers are trying to find out why
Update: 2025-10-15
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In 2023, the DEQ listed sections of the Gallatin River as impaired due to recurring algal blooms. The blooms choke out fish and degrade water quality. State scientists are amid a six-year study trying to understand what's causing the harmful blooms. The state says it will use the results to inform local development regulations and a plan to protect the river.
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