Ground Water Canada

News Contamination Surface Water Water Issues
Blue-green algae confirmed in Shubenacadie-Grand Lake, N.S.

June 21, 2021  By Ground Water Canada

Shubenacadie-Grand Lake, N.S. – The Nova Scotia Department of Environment and Climate Change has issued a blue-green algae advisory for Shubenacadie-Grand Lake after testing confirmed the presence of blue-green algae consistent with levels that are dangerous to dogs.

Pesticides and other contaminants were found to be below detectable levels.

As a result, People should not drink or cook with the water at any time, as the risk of blue-green algae may always be present in the warm months, the department said in a news release. It is safest not to swim or boat in the lake. People who choose to swim or boat in the lake should watch for blue-green algae and be aware of the potential risks.


The advisory will continue through the summer as blue-green algae is likely to appear again.

Blue-green algae can appear at any time, particularly in warm water or water with a lot of nutrients, and blooms are appearing more frequently in Nova Scotia as a result of climate change and hotter weather in summer and fall. Anyone who sees a blue-green algae bloom should contact one of the department’s regional offices.

Homeowners should not consume water from Shubenacadie-Grand Lake, or any other lake or river, as the water quality is subject to change and may be impacted by natural and man-made contaminants. Residential treatment systems typically are not capable of removing the toxins produced by blue-green algae. If you use surface water for drinking water, consult a water quality specialist to determine whether your treatment system will remove blue-green algae toxins.

Any homeowner who has questions about their well-water quality or well construction should have their well water tested, or contact a certified well contractor to inspect their well, the release said.

Some area residents have raised concerns about the nearby Oakfield Golf and Country Club. Staff have visited the golf course to check how pesticides are being handled and stored. The department has not found any concerns related to pesticide use or storage at the golf course, or any non-compliance issue involving the facility.

List of accredited labs where homeowners can have their water tested:

Read more about blue-green algae.

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