The Illinois Environmental Protection Agency has confirmed the presence of the algal toxin, microcystin, along the northern bank of the Illinois River at the Starved Rock Lock & Dam.
Algal toxins (e.g., microcystin and cylindrospermopsin) sometimes produced by blue-green algae can cause sickness or other adverse health effects in people and pets, depending on the amount and type of exposure. Illinois EPA also tested for, but did not detect the presence of, cylindrospermopsin on the Illinois River.
The very young, elderly, and people with compromised immune systems are most at risk if exposed to algal toxins. Adverse health effects attributable to algal toxins can occur from direct skin contact, swallowing contaminated water, or inhaling water droplets in the air. Symptoms of exposure include rashes, hives, diarrhea, vomiting, coughing or wheezing. More severe symptoms may result from longer or greater amounts of exposure.
Residents who plan to recreate in, on, or near Illinois rivers, lakes or streams are advised to avoid contact with water that:
- looks like spilled, green or blue-green paint
- has surface scums, mats, or films
- is discolored or has green-colored streaks
- has greenish globs suspended in the water below the surface
Do not let pets drink from water with any of the above characteristics.
If you or your pet have come into contact with water you suspect may have a bloom of blue-green algae, rinse off with clean, fresh water as soon as possible. With all activities that may involve contact with lake or stream water, wash your hands before eating.
If you are concerned you have symptoms that are a result of exposure to algal toxins, contact your health care provider or call the Illinois Poison Center at 1-800-222-1222. If your pet experiences symptoms that may be a result of exposure, contact your veterinarian.
Illinois EPA will conduct additional sampling in the coming week to determine if conditions have improved along the Illinois River.
