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Health Advisory

Blue-green algae bloom advisory for Moonshine Lake

Aug 6, 2026 | 12:21 PM

Alberta Health Services is warning the public that there are blue-green algae blooms in Moonshine Lake.

Visitors and residents are being advised that the naturally occurring cyanobacteria are common during warm weather, and blooms can be blue-green, greenish-brown, brown, pink and/or red, and can look like scum, streaks, grass clippings, fuzz balls, paint or pea soup. They often smell musty or grassy.

If you plan on visiting Moonshine Lake in the near future, please take the following precautions:

  • Do not swim or wade in any areas where cyanobacterial blooms are visible.  
  • Avoid all contact with cyanobacterial blooms in the water and washed up on shore. Wash with clean tap water as soon as possible if contact occurs.
  • Do not drink or cook with water from this lake.
  • Do not eat whole fish or fish trimmings from this lake as fish may store toxins in their liver. Fish fillets contain fewer toxins and are safer to eat.
  • Keep pets away from the water. Do not allow pets to swim in areas where cyanobacterial blooms are visible or to contact blooms in the water or on the shore.
  • Do not feed whole fish or fish trimmings from this lake to your pets.

People who come in contact with blue-green algae or who ingest water containing it may experience skin irritation, rash, sore throat, sore red eyes, swollen lips, fever, nausea and vomiting and/or diarrhea. Symptoms can appear within one to three hours and resolve in one to two days. Symptoms in children are often more pronounced; however, all people are at risk of these symptoms. Exposure to blue-green algae may be fatal to pets.

This health advisory will be in effect until further notice. The waters of Moonshine Lake where blooms are not visible can still be used for recreational purposes, even with the health advisory in place.

If you suspect a problem related to cyanobacteria or if you require further information on health concerns and cyanobacteria, please call Health Link at 811. Additional information is also available online by clicking here.