Algae blooms that can sicken people and pets were reported Monday afternoon at public beaches on Lake Altoona and Lake Eau Claire.
The Eau Claire City-County Health Department posted a water quality advisory on its Facebook page, warning people to stay away from the toxic blue-green algae blooms.
Residents are recommended to stay away from water with a visible layer of algae scum and keep pets away from it as well.
Symptoms of blue-green algae exposure in humans include stomach cramps, diarrhea, vomiting, headache, fever, muscle weakness and difficulty breathing. In pets, the symptoms can include seizures, vomiting or diarrhea after contact with surface water.
Although the algae blooms were reported at the two beaches, the health department did not close them on Monday. Only Half Moon Beach, which has been closed for several days due to high bacteria counts, was officially off-limits to swimmers on Monday.