The Ministry of the Environment, Conservation and Parks has confirmed a blue-green algae bloom impacting the northwest shoreline of Mary Lake, in the Town of Huntsville, based on lab results for samples collected November 5, 2026.

Residents are advised to keep people and pets out of the water, to avoid contact with blue-green algae, and to visit the Simcoe Muskoka District Health Unit website www.simcoemuskokahealth.org for more information.