Gallatin River Goes Neon-Green with Algal Blooms for Fifth Consecutive Year

Montana Dept. of Environmental Quality Needs to Identify Nutrient Pollution as the Causal Agent for Algal Blooms; Public Encouraged to Submit Comment to Protect River Neon-green algal blooms are plaguing the world-class Gallatin River downstream of Big Sky and the…

FAQs: Gallatin River Middle Segment Impairment Designation

June 2022 Preliminary Determination of Impairment What’s being proposed? Based on a review of best available science from the past 10 years, the Montana Department of Environmental Quality (DEQ) has issued a preliminary determination that the middle segment Gallatin River…

State of Montana Determines Gallatin River ‘Impaired’ by Algal Blooms

Conservation Groups’ Petition Granted by Dept. of Environmental Quality  On Tuesday, June 14, the Department of Environmental Quality (DEQ) made a preliminary finding that the Gallatin River merits a Category 5 impairment designation under Section 303(d) of the federal Clean…

Gallatin River Goes Green for Fourth Consecutive Year

In early August, a noxious neon-green algal bloom emerged on the mainstem Gallatin River downstream of Big Sky for the fourth consecutive year. Booming development pressure and chronically poor treatment of wastewater in the Big Sky area, combined with hot…

Summer 2020 Neon-Green Algal Bloom on the Gallatin River

Once again Montana’s World-Famous Gallatin River is Experiencing a Miles-Long, Green Algal Bloom.  This “New Normal” is not, in fact, Normal. The Gallatin River is a jewel of our state and the treasured community backyard of Big Sky and Bozeman….

Gallatin River Algal Bloom – August 2018

The Gallatin River is experiencing a large, miles-long neon-green algal bloom for the first time in recent memory. The Algal Bloom: Waterkeeper first became aware of the emerging algal bloom on the Gallatin late July 2018.  A few members shared…