5/5/25 UPDATE: The DOH has lifted the Blue-Green Algae Health Alert for Lake Killarney.
The Florida Department of Health in Orange County is calling attention to the possible presence of blue-green algae in Lake Killarney (Killarney Drive) on April 28.
Water sample testing is underway. Blue-green algae have the potential to produce toxins. The State has shared that since environmental conditions can change at any time, it is important to exercise caution, even if the presence of toxins has not yet been confirmed.
Residents and visitors are advised to avoid water contact and to keep pets away from the water’s edge. Be sure to wash and cook any fish caught in the lake thoroughly before eating.
The Florida Department of Environmental Protection (DEP) and partners collect algae samples from reported bloom locations. After samples are analyzed at their laboratory, the toxin results can be viewed on Protecting Florida Together or on DEP’s Algal Bloom Dashboard.
Some environmental factors that contribute to blue-green algae blooms are sunny days, warm water temperatures, still water conditions, and excess nutrients. Blooms can appear year-round, but are more frequent in summer and fall. Many types of blue-green algae can produce toxins. Blue-green algae may not always be visible as a bloom, but it can still be present in the water.
