City of Orlando – Lake Caution for Lake Mann

August 23, 2022

UPDATED Information - The Florida Department of Health (FDOH) in Orange County has extended a Health Caution for the presence of blue-green algae in Lake Mann. This is in response to a site visit and water sample taken by the Florida Department of Environmental Protection (FDEP) on August 16, 2022. The public should exercise caution in and around Lake Mann.

The official toxin determination is obtained from FDEP's data, and until the levels are deemed safe by state standards, the Lake Caution will remain in effect as per FDOH. Find current information about Florida’s water quality status and public health notifications for harmful algal blooms by visiting ProtectingFloridaTogether.gov

To report a bloom to FDEP, call the toll-free hotline at 855.305.3903

On March 23, 2022, the Florida Department of Environmental Protection (FDEP) tested water samples from Lake Mann, taken by the Gilbert McQueen boat ramp, and determined that potentially unsafe concentrations of toxins are present in the lake. As a precaution, we are advising everyone to refrain from swimming, recreating and irrigating in/from Lake Mann until further notice.

For reference, cyanobacteria/blue-green algae are always present in the water, however, not all bacteria have the ability to produce toxins. Toxicity is hard to predict because a single species of algae can have toxic and non-toxic strains. Nothing can be done to treat algae blooms without causing massive fish kills. In the coming weeks, the city will work closely with Florida Department of Environmental Protection (FDEP) to monitor Lake Mann. Once we obtain more information on the status of the lake, we will continue to update this Lake Alert.

Please encourage your neighbors to register for the Lake Alert at orlando.gov/lakealert so they too will get important information about Lake Mann directly.

In the meantime, as we stated above, the city would advise refraining from swimming, recreating and irrigating in/from the lake until further notice.

Please visit this link for additional information:

http://www.floridahealth.gov/environmental-health/aquatic-toxins/harmful-algae-blooms/index.html