Health authorities issued a public health advisory Friday for Hauser Lake, after recent water sampling by the Idaho Department of Environmental Quality indicated the presence of cyanobacteria, also known as a harmful algae bloom.

The advisory is based on field observations, water sample results, potential public health impacts and the recommendation of DEQ, according to a news release published by Panhandle Health District. 

The public should take precaution throughout the lake, as harmful algae blooms, also known as HABs, can spread and move with wind and water traffic. 

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. 

The physical appearance of these blooms can vary, presenting as discolored water, streaks or globs of scum. The blooms can cause thick green mats along lake shorelines. Caution should be taken anywhere the water appears discolored or murky. 

Symptoms of exposure to HABs can include rashes, hives, diarrhea, vomiting, coughing and/or wheezing. More severe symptoms affecting the liver and nervous system may result from ingestion of water. Pets, children, the elderly and people with compromised immune systems are most at-risk of harmful exposure. 

Cyanobacteria cannot be removed by boiling or filtering water. If people choose to eat fish from the lake, it is recommended they remove all fat, skin and organs before cooking, because toxins are more likely to collect in those tissues. 

If contact has been made with water containing a HAB — such as through swimming, bathing or showering — it is recommended to wash off with fresh water.