Health warning for blue-green algae lifted; new warning issued

As a health advisory for blue-green algae in the Caloosahatchee River expires, a new one is being issued.

The Florida Department of Health in Lee County is warning the public about the presence of blue-green algae in Hancock Creek and the Seaside Key Court Canal north of the river.

This canal is located just west of the Caloosahatchee River Bridge, which carries US 41/Cleveland Avenue over the Caloosahatchee River near Lochmoor (LOCH-more) Waterway Estates.

The health department warns the public to be cautious and use caution in this area as blue-green algae has the potential to produce toxins. Since environmental conditions can change at any time, caution is advised, even though the presence of toxins has not yet been confirmed.

Blue-green algae is a type of bacteria that is common in Florida’s freshwater environments. An algal bloom occurs when the rapid growth of algae leads to the accumulation of individual cells that discolor the water and often form floating mats that give off unpleasant odors.

Blooms may also appear as foam, scum, or paint of various colors on the water surface. Some environmental factors that contribute to blue-green algae blooms include sunny days, warm water temperatures, stagnant water, and excess nutrients.

Flowers can appear all year round.

The health department advises residents and visitors to take the following precautions:

• Do not drink, swim, wade, use watercraft, or come into contact with water where visible mold growth is present.
• Wash your skin and clothing with soap and water if you come into contact with algae or discolored or unpleasant-smelling water.
• Keep pets and livestock away from the area to avoid any contact with water. Water bodies where algal blooms are present are not safe for animals. Pets and livestock should use an alternative water source during algal blooms.
• Do not cook or flush with water contaminated by algal blooms. Boiling the water will not remove the toxins.
• Do not eat shellfish in waters with algal blooms.

Blue-green algae can produce toxins that can be harmful to humans and pets, as well as ecosystems such as fish and other aquatic animals.

Sensitive individuals such as children, the elderly and those with weakened immune systems may be at risk even at low concentrations and should therefore avoid any contact.

Nearby, a blue-green algae warning that had been in place for nearly two weeks upstream in the C43 channel has been lifted. However, the channel remains under warning status.

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