Blue-Green Algae Bloom

Oct 16, 2023 (updated Jul 12, 2024, 4:50pm)

As of July 12, the advisory has been lifted at Elk Lake and Thetis Lake. However, the advisory for Beaver Lake is still in effect at this time.

The Capital Regional District (CRD), in consultation with Island Health, has lifted the advisory for Elk Lake and Thetis Lake. Water samples collected indicated that the risk is low. 

However, please note that there is still an active advisory in effect for Beaver Lake  located in Elk/Beaver Lake Regional Park at this time.

Blue-green algae can produce cyanotoxins. Visitors are advised to avoid contact with blue green algae and to keep animals on a leash to prevent them from drinking or swimming in the lake until the advisory has been lifted.

The algae usually produce a visible blue-green sheen, which appears as surface scum on the water. Not all blooms are easy to see, and toxins can still be present in the water even if you cannot see a bloom. Blooms are unpredictable and may occur at any time.

These algae are known toxin producers. Ingesting water containing these cyanotoxins may cause a range of symptoms, including headaches and abdominal pain in humans, and can lead to lethal liver damage in dogs.

Please visit and X @crd_bc for updates on the status of this algae bloom. To learn more about blue-green algae visit these sites: