Blue-green algae bloom spotted in lake northwest of Sudbury

A visible bloom of blue-green algae has been observed in Ivanhoe Lake, located near Foleyet. (File)

A visible bloom of blue-green algae has been observed in Ivanhoe Lake, located near Foleyet.

The bloom was confirmed by the Ministry of the Environment, Conservation and Parks, which alerted Public Health Sudbury & Districts.

Samples from a bloom on the lake were taken Sept. 23 and were later confirmed for cyanobacteria, or blue-green algae.

“The samples contained a species of cyanobacteria that can produce toxins,” the health unit said in a news release.

“Blue-green algal blooms could also appear in other parts of the lake. Because blooms are not anchored, they can move from one location to another through wind and water currents. New blooms can also form. All residents on lakes should look for blooms in their area.”

Don’t drink the water

Residents should avoid using or drinking water from areas where blooms are visible, since toxins can spread throughout the water body.

“However, the highest concentrations of toxins are usually found in blooms and scum on the shoreline,” the release said.

“These dense accumulations pose the greatest potential risks to people and pets. The algae toxins can irritate a person’s skin and, if ingested, cause diarrhea and vomiting. If a person ingests high levels of toxin, they could suffer liver and nervous system damage.”

Don’t use the water for bathing, drinking or allow pets and children to swim in the water.

“Be aware that shallow drinking water intake pipes can pump in blue-green algae,” Public Health said.

“Do not boil the water or treat it with a disinfectant like bleach: this action breaks open the algae cells, which releases more toxins into the water.”

Residents should also exercise caution with respect to eating fish caught in water where blue-green algal blooms occur. Residents should not eat the liver, kidneys, and other internal organs of fish.

For more information on blue-green algae, visit the health unit’s website (phsd.ca) or call 705-522-9200, ext. 464, or toll-free 1-866-522-9200.