As of Oct 1, the advisory has been lifted for Prior Lake. However, blue-green algae blooms are unpredictable and may occur at any time.
The CRD, in consultation with Island Health, has lifted a beach advisory for Prior Lake located at the north end of Thetis Lake Regional Park. Water samples collected indicated a “below detection limit” result for cyanotoxins. The extended absence of blue-green scum combined with test results are good indicators that the bloom is over.
Park users are reminded to watch for the distinctive blue-green sheen, which can appear on the lake surface. Blue-green algae 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.
To learn more about blue-green algae visit these sites:
• Healthlink BC
• Health Canada
Thetis Lake Regional Park map (PDF)