On July 10, 2025, the Florida Department of Health in Polk County (DOH-Polk) reported blue-green algae in:
- Lake Pierce – NW
- Lake Hamilton East – Sample Park
- Lake Crago (near the boat ramp)
Water testing is underway, and though toxins are unconfirmed, caution is advised due to potential toxin production.
Blue-green algae, common in Florida’s freshwater, can form blooms that discolor water, create mats, and emit odors, appearing as scum or foam. Sunny days, warm water, still conditions, and excess nutrients drive blooms, which are more common in summer and fall. Some algae produce toxins harmful to humans, pets, and ecosystems, with higher risks for children, the elderly, and immunocompromised individuals.
Avoid drinking, swimming, or using watercraft in affected waters. Wash skin and clothing after contact with algae or discolored, odorous water. Keep pets and livestock away, using alternative water sources. Do not cook or clean with contaminated water, as boiling does not remove toxins. Fish fillets from healthy fish are safe if rinsed, with guts discarded and fish cooked thoroughly. Avoid eating shellfish from affected waters.
The Florida Department of Environmental Protection (DEP) is analyzing samples, with results on DEP’s Algal Bloom Dashboard or Protecting Florida Together. Water quality updates are available at Protecting Florida Together, with subscription options.
Report algae blooms to DEP at 1-855-305-3903 or online. Exposure symptoms can be reported to the Florida Poison Information Center at 800-222-1222. Contact veterinarians for pet illnesses. Report fish kills or abnormal wildlife to the Florida Fish and Wildlife Conservation Commission at 800-636-0511 or online.
