Skip to content

Blue-green algae found at two more Thunder Bay-area lakes

This is the eighth confirmed finding since June.
Lac des Mille Lacs cropped
Lac des Mille Lacs is about 100 km northwest of Thunder Bay (

THUNDER BAY — Laboratory tests have confirmed the presence of blue-green algae at Lac des Mille Lacs and Madalaine Lake in the Thunder Bay district.

The provincial environment ministry tested a water sample taken Sept. 26 at Open Bay on Lac des Mille Lacs, and a sample collected at Madalaine Lake on Oct. 6.

Blue-green algae may carry organisms that are toxic to humans and animals.

This is the eighth time since June that its presence has been confirmed in district lakes.

The Thunder Bay District Health Unit, which released the latest findings Monday, says climate change may be making blue-green algae blooms more common in Northwestern Ontario.


Be the first to read breaking stories. Allow browser notifications on your device. What are browser notifications?
No thanks