Goose River Discoloration Linked to Low Water Levels
Officials confirmed that environmental factors caused the water to turn red near Caledonia, North Dakota.
Updated on Sept. 22, 2026 in Current Conditions
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The North Dakota Department of Environmental Quality has determined that low water levels and oxygen depletion caused a red discoloration in the Goose River. Authorities have advised the public to avoid drinking from or recreating in the affected area.
Why it matters
The investigation was prompted by public reports of the unusual water color, leading to fears of potential pollution. Tests confirmed that natural conditions, rather than wastewater discharge, were the root cause of the phenomenon.
Testing of samples collected between Mayville and the Red River showed no signs of illegal wastewater facility discharge. The state identified high temperatures, low flow, and organic matter as the drivers of oxygen depletion.
The players
North Dakota Department of Environmental Quality
This state agency is responsible for protecting North Dakota's air, land, and water resources through regulation and monitoring.
U.S. Geological Survey
This federal scientific agency provides data and research regarding natural resources, ecosystems, and environmental health across the United States.
The details
The North Dakota Department of Environmental Quality conducted field measurements and laboratory testing in collaboration with the U.S. Geological Survey to identify the source of the discoloration. Authorities determined that groundwater and organic decay in stagnant water were responsible for the color change.
Timeline
Crews began water testing in the Goose River on September 11, 2026.
The department released the review findings on September 22, 2026.
Seasonal Patterns
The Goose River investigation follows a pattern set by established public health and environmental monitoring protocols which mandate immediate collaborative response to anomalous environmental reports. This assessment reflects typical responses to natural water quality degradation caused by late-season temperature spikes.
Residents are advised to avoid drinking from or recreating in the affected segment of the Goose River until further notice. The state will continue to monitor conditions in the river and downstream segments of the Red River of the North.
The takeaway
The discoloration serves as a reminder of how quickly natural factors like low water flow and heat can alter local river ecosystems. Monitoring for these conditions remains essential for maintaining public safety in the region.
Further reading
For more information on state water quality reports, visit North Dakota Current Conditions.
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