Southwest District Health (SWDH) and the Idaho Department of Environmental Quality have issued a health advisory for Hells Canyon Reservoir from Copper Creek down to Hells Canyon Dam, urging anyone recreating in or near the water to use caution.
Recent water samples indicate concentrations of toxin-producing blue green algae (also known as cyanobacteria), which can harm people, pets and livestock.
Cyanobacteria are a natural part of Idaho’s water bodies. When temperatures rise, their populations can bloom and toxic chemical compounds, or cyanotoxins, can be released into the water.
Blooms vary in appearance, and may look like mats, foam, spilled paint, or surface scum and have a foul odor.
See the full SWDH news release for more information.