LaPrele Park, Huck Finn Pond

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Laramie, WY – On August 12, 2020, the City of Laramie received notification from the Wyoming Department of Environmental Quality’s Wyoming Harmful Cyanobacterial Bloom Program (DEQ-HBC) of a possible fatal dog poisoning associated with Huck Finn Pond, located in LaPrele Park.

As a result of this notification, a DEQ sampling of the pond was taken on August 13, 2020. Findings from the sampling revealed the concentrations were not elevated at the time of sampling and an advisory was not issued based on cyanotoxins; however, the pond will remain as “under investigation.” These results can be viewed on the DEQ’s HCB advisories map at

Signs will remain posted in the area to alert visitors to the park and pond area of the potential health risks to both people and animals. The City of Laramie Animal Control staff, as well as their veterinary partners, will be kept apprised of the situation.

Cyanobacterial blooms float on or just below the water surface or leave a blue-green paste on the shoreline and can turn the water green or look like threads, clumps, scums, and spilled paint.


  • Do Not Swim in or come into contact with green water, floating scums or clumps.
  • Do not ingest water from a bloom. Boiling, filters, and other treatments will not make the water safe.
  • Rinse fish with clean water and eat only the fillet portion.
  • Avoid water spray from a bloom.
  • Do not allow pets or livestock to drink water near a bloom, eat bloom material, or lick fur after contact.

 IMPORTANT:  If you or your pet get sick after water contact or ingestion, call your doctor or veterinarian.

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