This is why you should keep an eye out for this incredibly toxic type of algae in lakes and rivers ... the Minnesota Pollution Control Agency has a handy chart that ranks exposure risks based ...

The Manitoba government, however, remains concerned because the study found some types of algae and fish parasites that might harm aquatic life in Canada. North Dakota started draining water this ...

“Duckweed is naturally occurring, typical to low-flow and/or ... a harmful algae bloom in recent memory,” Copeland said. “During every season, different types of algae can be observed ...