Summer heat could be to blame for the high levels of blue algae in the water, health officials said. Children, nursing and pregnant women and other with weakened immune systems are being warned to stay out of the water.

Public health advisory for Kiser Lake algae toxins

Warning signs have been posted at Kiser Lake State Park, near St. Paris in Champaign County.

The health department advises against swimming or wading, especially for children, pregnant women, those with medical conditions and pets.

Cyanobacteria, often called blue-green algae, are commonly found in Ohio lakes, ponds and slow-moving rivers. Many species do not produce toxins, but some cause harmful algal blooms. The blooms are visible as thick mats or scum on the surface of the water, which can vary in color from bluish-green, bright green, or even red or maroon, according the the health department.

For more information, contact the Champaign Health District at 937-484-1605.

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