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Blue-green algae advisory issued for Nakamun Lake

Advisories also in effect for Thunder Lake and Lac Ste. Anne
Blue-green algae floats in the water of Baptiste Lake in August of 2013. The lake has once again been placed under a health advisory for the presence of cyanobacteria.
Blue-green algae has been spotted in parts of Nakamun Lake, prompting Alberta Health Services (AHS) to issue an advisory to the public.

BARRHEAD — Alberta Health Services (AHS) has issued a blue-green algae advisory for Nakamun Lake, which is located just south of Dunstable and slightly northeast of Rich Valley. 

Blue-green algae, also known as cyanobacteria, is naturally occurring and often become visible when weather conditions are calm. They appear like scum, grass clippings, fuzz or globs on the surface of water. 

As the name implies, cyanobacteria can be blue-green in colour, but it can also be greenish-brown, brown and/or pinkish-red. It often smells musty or grassy. 

People who come into contact with visible cyanobacteria or who ingest water containing it may experience skin irritation, rash, sore throat, sore red eyes, swollen lips, fever, nausea, vomiting and/or diarrhea. 

Symptoms usually appear within one to three hours and resolve in one to two days, though they may be more pronounced in children. As well, exposure to cyanobacteria can be fatal to pets. 

As such, visitors and residents living near the shore of Nakamun Lake are advised to avoid all contact with cyanobacterial blooms. If contact occurs, wash with tap water as soon as possible. 

Do not allow pets to swim or wade in any areas where blue-green algae blooms are visible. 

Human consumption of fish or fish trimmings from Nakamun Lake should be limited, as fish are known to store cyanobacteria toxins in their liver. Also, pets should not be allowed to eat fish or fish trimmings from either lake. 

AHS advises that the boiling of contaminated water will not remove the toxins produced by cyanobacteria, so an alternate source of drinking water should be provided to pets and livestock while this advisory is active. 

Weather or wind conditions may cause algae blooms to move from one area to another, so this advisory will remain in effect until further notice. 

However, portions of Nakamun Lake where blue-green algae is not visible can still be used for recreational purposes even while the advisory is in place. 

If you suspect a problem related to contact with blue-green algae, you may contact Health Link at 8-1-1.

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