Learn about blue-green algae – bacteria that can be harmful to humans and animals – and what you should do if you spot it.
Blue-green algae are microscopic, plant like organisms that occur naturally in ponds, rivers, lakes and streams. Although often blue-green, they can also be olive- green or red.
For information regarding causes, what to do if you spot it, if it's near your water supply, prevention, etc. please use the links below.
Ministry of Ontario; Blue-green algae
Peterborough Public Health; Blue-Green Algae Blooms May Contaminate Lakes