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Blue-green algae bloom located on Mary Lake

Friday, 13 November 2026 at 15:08

The bloom was reported today. Residents are advised to take precautions

A blue-green algae bloom has been identified along the northwest shoreline of Mary Lake in Huntsville.

The Simcoe Muskoka District Health Unit says the bloom was reported today and remains active.

Blue-green algae can produce toxins that are harmful to people and animals. Residents are being advised to avoid contact with discoloured water or any visible algae, and keep pets away from affected areas.

Anyone who suspects a bloom is asked to report it to the Ministry of the Environment for investigation and testing.

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