Lake Marian Blue‑Green Algae Alert: What You Need to Know

The Osceola County health officials have released a new warning about toxic blue‑green algae in the Lake Marian area. A recent water test on May 11 confirmed that dangerous toxins are present, prompting the department to act. This isn’t the first time the county has faced this issue; similar alerts appeared earlier in the year and back in 2022. People who visit Lake Marian should stay away from any part of the lake that looks green or has a strange smell. Swimming, wading, or riding personal watercrafts in these waters can expose you to harmful bacteria. If you accidentally touch algae or see discolored water, wash your skin and clothes with soap right away. Pets and farm animals are also at risk. Animals that drink or play in contaminated water can get sick, so owners should provide clean drinking options instead. Using lake water for cooking or cleaning dishes is unsafe; boiling does not remove the toxins.When it comes to food, fresh fish from a lake with an algae bloom can still be eaten safely if you handle it correctly. Rinse the fish under tap or bottled water, discard the guts, and cook the flesh thoroughly. Shellfish should be avoided entirely because they can concentrate toxins from the water. Blue‑green algae are a type of bacteria that thrives in Florida’s warm, still waters. They grow rapidly when there is plenty of sunlight and nutrients, forming visible blooms that can look like green scum or foam. Even if a bloom isn’t obvious, the bacteria might still be lurking in the water. Because these blooms can appear at any time but are more common during summer and fall, staying informed is key. Keep an eye on local alerts and follow the safety tips above to protect yourself, your family, and your pets.