Risk Of Blue-Green Algae Increases With The Temperature

EDMONTON - Hot weather and sunny skies are increasing the chance of blue-green algae appearing on nutrient-rich lakes in Alberta this summer.

As certain types of blue-green algae break down, they release bright blue and green pigments and toxins that can be hazardous to people, pets and wildlife.

Throughout the late summer months, and especially during calm, warm weather, naturally occurring algae rise to the surface of lakes and ponds throughout Alberta. Wind and waves concentrate them in visible masses or blooms in bays and along shorelines. Lakes with algae blooms often have a strong unpleasant odour and appearance.

Not all strains of blue-green algae are toxic. However, toxic strains and non-toxic strains can occur at the same time in a lake. Toxicity in a lake is normally temporary, lasting only as long as a bloom or signs of a bloom persist, and can occur in parts of the lake where blue-green algae are not particularly abundant.

If you suspect an algal bloom on your lake take the following precautions:

* Do not drink the water from any bloom-infested lake or reservoir

* Do not swim or wade in the water

* Do not let your children drink or swim in the water

* Do not allow pets, domestic animals or livestock to swim in or drink from the lake

* Provide alternative sources of drinking water for domestic animals and pets

If you experience fever, headache, dizziness, stomach cramps, vomiting, diarrhea or sore throat that you suspect came from contact with an algal bloom, contact your physician immediately. If your pet has symptoms, contact your veterinarian as soon as possible.

If you encounter fish or wildlife that you suspect may have been harmed by blue-green algae, please contact your local Fish and Wildlife office by calling 310-0000, toll-free in Alberta.

More information about blue-green algae can be found on Alberta Environment's website at www.gov.ab.ca/env/water/swq/brochures/algalblooms.html. If you have further questions, call Alberta Environment at 1-800-222-6514.

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For further information:

Kim Hunt
Communications
Alberta Environment
(780) 427-6267