The Department of Natural Resources says the brutally cold winter we had this year may be to blame for an early bloom.
"It's possible that since the lake water was cooled for so long that has deterred plant growth in lakes," says Wisconsin DNR research scientist Gina LaLiberte. "The plants are emerging a little bit later and without plants competing with them for nutrients in the lake water, that may have given blue green algae a little bit of an edge in developing."
People are at risk if they come in contact with the bacteria. Here are some symptoms to watch out for:
Eye, ear and skin irritation
Gastrointestinal problems like vomiting and diarrhea
If, ingested in large quantities, it can also cause nerve or liver problems
The bacteria can also be harmful to animals, so make sure animals don't water where blue green algae is present.
If you want more information about the dangers of blue green algae, the DNR will be holding an online chat today (Tuesday) at noon. Just head to the DNR website and click on the graphic.