Cyanobacteria blooms occur when blue-green algae rapidly grows out of control. (Courtesy of Lorraine Backer/Centers for Disease Control and Prevention public health image library)
The Idaho Department of Health and Welfare has issued a health advisory for the west side of Henry’s Lake near eastern Idaho’s Island Park, urging caution when recreating in or near the water.
Recent samples from the Henry’s Lake showed high amounts of toxin-producing cyanobacteria, which can cause harmful algal blooms in the water. The toxins they produce — called cyanotoxins— can be harmful to people, pets and livestock.
When recreating near or in the west side of Henry’s Lake, Health and Welfare said in a press release that Idahoans should take the following precautions while the advisory is in effect:
Cyanobacteria are a natural part of Idaho’s water bodies, but when temperatures rise, their populations can bloom and toxic chemical compounds can be released into the water, the press release said. Blooms don’t all look the same. They may look like mats, foam, spilled paint or surface scum and have a foul odor, according to Health and Welfare.