A blue-green algae bloom has been confirmed along the northwest shoreline of Mary Lake in Huntsville.
The Ministry of the Environment, Conservation and Parks confirmed the bloom following laboratory testing of water samples collected on November 5.
Officials are advising residents to keep people and pets out of the water and avoid any contact with the algae.
More information about the blooms and potential health risks can be found on the Simcoe Muskoka District Health Unit website.
