Be advised about possible algae bloom at Prospect Lake

November 22, 2016

The District of Saanich has been advised that blue-green algae may be present in Prospect Lake -- we are working with the Capital Regional District to test the water.

In the meantime, visitors and residents are advised to take the following precautions:

  • Avoid all contact with blue-green algae (cyanobacteria) blooms. If contact occurs, wash as soon as possible.
  • Do not allow your pets to swim or wade in any areas where blue-green algae is visible.

These precautions are advisable because blue-green algae are known toxin producers. The blooms are unpredictable and may occur at any time. Ingesting water containing the cyanotoxins may cause a range of symptoms including headaches and abdominal pain in humans. Cyanotoxins can lead to lethal liver damage in pets and livestock. 

Once water testing is complete, Saanich will post updates on signs near Prospect Lake and on our website. 

Blue-green algae produces a visible blue-green sheen, which appears as surface scum. If you notice a blue-green algae bloom, please report it to Saanich Parks at 250-475-5522 or

For more information about blue-green algae, please visit or call 8-1-1.