That includes Deer Creek Reservoir, which has been under a toxic algae warning advisory since August.
All of the reservoir’s recreation areas are under the warning. Utahns are advised to not swim, water ski or drink the water. Dog owners are also advised to keep pets out of the water.
The Division of Wildlife Resources says fishing is OK only if anglers discard skin and guts.
The Utah Department of Environmental Quality stops monitoring harmful algae as the weather cools, lowering the risk. However, blooms can persist through the fall and winter.
Toxic algal blooms form when naturally-occurring bacteria reach high densities, causing water discoloration, scum and mats.
