MANTUA — The Bear River Health Department has issued a warning for everyone and their pets to avoid the water of the Mantua Reservoir. 

According to the Utah Department of Environmental Quality, the health department issued the warning on Sept. 12 after signs of a toxic algae bloom were first detected on Sept. 8 by Utah Water Watch

The warning does not affect drinking water, according to a Facebook post from the Bear River Health Department.

Signs will be posted around the reservoir warning people about the water’s potential health risks.

The health department signs near the pond will tell people the following:

  • Do not swim or water ski
  • Do not drink the water
  • Keep pets and livestock away
  • Clean fish well and discard guts
  • Avoid areas of scum when boating

This is the second warning of its kind issued in Northern Utah in the past week. The Weber-Morgan Health Department issued a warning of a potential algae bloom at Ogden’s 21st Street Pond last Friday.

People who believe they may be experiencing symptoms of exposure to the toxic water should immediately contact the Utah Poison Control Center at (800) 222-1222. 

If you suspect your pet may have been exposed, contact your veterinarian immediately.

Contact digital producer Jacob Scholl at or follow him on Twitter @Jacob_Scholl.

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