Blue-Green Algae Confirmed In South End Of Lake St. George

Residents Advised Not To Consume Or Swim In Water

In Severn Township, Blue-green algae has been confirmed in the south end of Lake St. George. This is the first confirmed case for Lake St. George. A bloom may appear bluish-green, or like green pea soup. The Simcoe Muskoka District Health Unit says that swimming and other water sport activities should be avoided in areas where a blue-green algae bloom is visible.

They advise residents around the south end of Lake St. George to avoid using the lake water for drinking or food preparation including infant formula. Boiling the water will not destroy the toxins.

Exposure to blue-green algae, whether for drinking, swimming, cooking or through eating fish caught from the south-end of Lake St. George may result in illness.

Symptoms from consuming toxins can include headaches, fever, diarrhea, abdominal pain, nausea and vomiting, and can be more serious if water is swallowed in large quantities.

The health unit and the MECP will continue to monitor the lake and updates will be posted on the health unit’s website at