Can you get sick from algae in a fountain?

Answer 1

The short answer, is YES. A more detailed answer is: Some blue-green algae produce toxins that could pose a health risk to people and animals when they are exposed to them in large enough quantities. Health effects could occur when surface scums or water containing high levels of blue-green algal toxins are swallowed, through contact with the skin or when airborne droplets containing toxins are inhaled while swimming, drinking, bathing or showering. Recreational contact, such as swimming, and household contact, such as bathing or showering, with water not visibly affected by a bluegreen algae bloom is not expected to cause health effects. However, some individuals could be especially sensitive to even low levels of algal toxins and might experience mild symptoms such as skin, eye or throat irritation or allergic reactions.

Answer 2

Yes, but usually they don't.