Blue-green
algae - avoid contact with the lake waterBloom and scum forming blue-green algae can produce toxins. These are normal occurrences in nature but can be harmful to some wild animals and most domestic pets. In humans, they have been known to cause rashes after skin contact and illnesses if swallowed. Not all blue-green algae blooms and scums are toxic, but you can’t tell just by looking at them, so it’s best to assume they are.
People (and pets), therefore should not come into contact with lake water to protect their health.