Zebra mussel DNA detected in Utah's Colorado River

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On 25 August 2026, the Utah Division of Wildlife Resources reported the first detection of zebra mussel DNA in Utah’s section of the Colorado River near the Potash Boat Ramp. The discovery followed the use of an environmental DNA autosampler that identified the genetic material in four of 22 samples collected during June and July 2026. This finding occurred after an established infestation was documented near Loma, Colorado, in 2025, raising concerns that the invasive species is moving further through the Upper Colorado River basin. While the presence of DNA does not confirm a live infestation, officials are collaborating with the U.S. Geological Survey, National Park Service, and Bureau of Land Management to investigate the status of the mussels.

Consequences

In the near term, officials are intensifying monitoring efforts to determine if zebra mussels have established a population in Utah waters. Additionally, the state has reinforced mandatory prevention measures for boaters and river users, requiring them to clean, drain, and dry watercraft to prevent the further spread of the species.

Sources

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