Blue-Green Algae Confirmed In Echo Lake, Lake of Bays


The Simcoe Muskoka District Health Unit would like to inform residents and visitors that a blue-green algae
(cyanobacteria) bloom has been confirmed by laboratory testing on a shoreline property in the east end of Echo Lake, Township of Lake of Bays. The health unit advises that human or animal consumption of lake water in this area should be avoided.
If you are drawing your water from an area of the lake with visible blue-green algae, boiling the water will not destroy toxins and home treatment devices may not be effective for their removal. Until further notice, do not use the water for drinking or for food preparation including breastmilk substitute (infant formula). Safe water sources include municipal water, bottled water or a private well that is not affected by lake water. The health unit, and the Ministry of Environment, Conservation and Parks (MECP) will continue to monitor the algal bloom and you will be notified when the water is safe for use.
The health unit cautions residents and businesses not to drink the water from this lake where blue-green algae is visible and to take the following precautions:
 do not use the lake water for drinking or for food preparation including breastmilk substitute (infant
formula), even if it is treated or boiled
 do not cook with the lake water because food may absorb toxins from the water
 do not allow pets or livestock to drink or swim in the water where an algae bloom is visible
 do not eat the liver, kidneys and other organs of fish caught in the lake. Be cautious about eating fish
caught in water where blue-green algae blooms occur.
 do not use herbicides, copper sulphate or other algaecides that may break open algae cells and
release toxins into the water
 avoid swimming and other water sport activities where an algae bloom is visible
Some blue-green algae produce toxins that can pose a health risk to people and animals when they are
exposed to them in large amounts. Stop using the water and seek medical attention if symptoms such as skin,
eye or throat irritation, allergic reactions or breathing difficulties occur while in contact with the bloom.
Anyone who comes into contact with blue-green algae should wash with soap and water or rinse thoroughly
with clean water. Swimming, bathing or showering with water not visibly affected by a blue-green algae
bloom is not expected to cause health effects.
The health unit and the MECP will continue to work together to monitor the algal bloom and updates will be
provided on our website ( as we receive new information.
For further information, call Your Health Connection Monday to Friday 8:30 a.m. to 4:30 p.m. at 705-721-
7520 or 1-877-721-7520. Links to general information and updates about blue-green algae are available on
the health unit website at


Please enter your comment!

Please enter your name here