Blue-green algae found in Pigeon Lake, Half Moon Lake

Alberta Health Services says blue-green algae can cause skin irritation, rash, sore eyes, sore throats, nausea, vomiting and diarrhea in people that come into contact with it. (File)

Alberta Health Services is advising visitors and residents of Pigeon Lake and Half Moon Lake to take precautions because of blue-green algae found in their waters.

Blue-green algae, or cyanobacteria, occurs naturally in hot, calm weather.

It looks like scum, grass clippings, fuzz or globs on the surface of water, can be a variety of colours, and smell musty or grassy.

Visitors and anyone who lives near the lakes should avoid:

AHS said fish fillets would be safe to eat.

Boiling water will not kill cyanobacteria in it.

Anyone who does come into contact with algae blooms should wash immediately.

Blue-green algae can cause skin irritation, rash, sore throat, sore red eyes, swollen lips, fever, nausea, vomiting, and/or diarrhea.

AHS said water where blooms are not visible can still be used recreationally even while the advisory is in place.

Pigeon Lake is located about 100 kilometres southwest of Edmonton. Half Moon Lake is located southeast of Sherwood Park.