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Staying Safe from Algae in the Caloosahatchee River

Caloosahatchee River, Sebastian Canal, USASaturday, May 9, 2026
A warning has gone out about harmful blue-green algae in a stretch of the Caloosahatchee River near the Sebastian Canal. Tiny bacteria that normally live in Florida’s freshwater have multiplied rapidly, creating visible blooms that can produce toxins. These blooms often look like thick green paint, floating scum, or foam on the water’s surface and sometimes come with a foul smell. While warm weather fuels these outbreaks, they can appear any time of year. The toxins can sicken people and animals if swallowed, touched, or inhaled. Kids, older adults, and anyone with weak immunity should be extra careful since even small amounts could cause problems. Pets and farm animals also face risks if they drink or swim in contaminated water. Boaters and swimmers should avoid areas where algae is visible, as even invisible bacteria can linger in the water.
To stay safe, don’t use the water for drinking, bathing, or cooking. If contact happens, rinse skin and clothes right away with soap and water. Cooking fish from affected waters is fine as long as you clean and cook them properly, but avoid shellfish from these areas entirely. Boiling won’t remove the toxins, so always use clean water for food prep. If you spot algae, the state tracks these blooms and wants to know. Report sightings to the Department of Environmental Protection online or by phone. Suspect health issues? Call the Poison Center for advice. Questions? The local health department is available to help.

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