Sundance Times - Continuing the Crook County News Since 1884

Cyanobacteria bloom confirmed at Keyhole


August 20, 2020

The Wyoming Department of Health has issued a recreational use advisory for Keyhole Reservoir due to a harmful cyanobacterial bloom (HCB).

On August 10, the Wyoming Department of Environmental Quality received a report from Keyhole State Park of dog illnesses that were potentially linked to cyanobacteria exposure. The Wyoming Department of Environmental Quality visited the reservoir on August 12 and collected water samples.

Cyanobacteria densities were found to exceed the 20,000 cells/mL recreational use threshold as identified in Wyoming’s HCB Action Plan. Cyanotoxin results are pendi...

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