What is the green stuff on lakes?


What is the green stuff on lakes? Algae are everywhere, in oceans, in freshwater lakes and riv- ers, on land, and even in the air we breathe. Sometimes called pond scum or seaweed, they are a natural part of any aquatic environment.


Is green algae in lakes safe?

Adults, children, and animals should avoid contact with water with blue-green algae. Toxins can persist in the water after a bloom; watch for signs of recent blooms, such as green scum on the shoreline.