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The original item was published from 7/26/2021 3:54:20 PM to 8/28/2021 12:00:03 AM.

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City of Moscow Press Releases

Posted on: July 26, 2021

[ARCHIVED] Hordemann Pond Closed Until Further Notice

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A health advisory has been issued for Hordemann Pond by Public Health – Idaho North Central District, the Idaho Department of Environmental Quality, and the City of Moscow. Water samples recently taken from Hordemann Pond confirmed the presence of the cyanobacteria, Dolichospermum, also known as blue-green algae, at levels that exceed the recreational water quality threshold. These species of algae can produce potentially dangerous toxins. Precaution is advised, and the pond is closed to all recreation activities, including fishing, until further notice.

 

Children and pets are particularly susceptible to the harmful effects of this type of algae. The following are the most common routes of exposure to cyanobacteria and related toxins during recreational activities:

  • Orally from accidental or deliberate ingestion of contaminated water.
  • Dermally by direct contact of exposed body parts with water containing cyanobacteria cells.
  • Inhalation through the aspiration of water containing cyanobacteria and their toxins.

 

Acute health effects in humans may include abdominal pain, headache, sore throat, vomiting and nausea, dry cough, diarrhea, blistering around the mouth, and pneumonia.

 

This bloom requires added precaution given the open area and water environment at Hordemann Pond. It can be seen in the uncharacteristically green color of the water, and the thick green mats present along shorelines.

 

Blue-green algae are naturally occurring microscopic bacteria. Many species occur in Idaho surface waters, and only some species release toxins under certain conditions. Harmful algal blooms occur in water conditions of optimal temperature, oxygen when nitrogen is unavailable, and phosphorus is abundant. These circumstances are most common during warmer months of late summer.

 

The public will be advised when the concern no longer exists. For more information, please get in touch with David Schott, Parks and Facilities Manager, at dschott@ci.moscow.id.us or 208-883-7098.

 

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