Blue-green algae detected at Whitby beach

Thestar.com
September 19, 2018

Durham Region’s health department has been advised by the Ontario Ministry of the Environment, Conservation and Parks (MECP) of the presence of blue-green algae in water samples taken from the Whitby beach area.

The laboratory test results were received last week from samples taken between Heydenshore Park and Rotary Sunrise Park, according to a news release sent out by the region on Sept. 11. Despite the presence, the department noted the level of blue-green algae detected in the water is low and not indicative of an algal bloom in the water and not considered to be a health risk to people or pets.

Algae washed up on the Whitby pier and the shores of Lake Ontario on Wednesday.

Water-quality advisory signs are posted at the beach to ensure the public is aware of the potential presence of blue-green algae in the water.

“While current test results from the MECP of water samples from the Whitby beach area found a level of blue-green algae that does not indicate the presence of a bloom, we want people to understand that water conditions could change at any time and the Health Department may not be immediately aware of these changes,” said Laura Freeland, manager of health protection with the region’s health department.

“As weather changes at this time of year could be unpredictable, changes in water quality could still occur if water temperatures remain warmer, which can help to increase algal growth,” she added.

“That’s why it’s important for people to look at the water for potential signs of blue-green algae, which could include scum or mats of algae on the water’s surface.”

If no bloom is present, water can be used for regular recreational activities, the release said.

Testing for blue-green algae is conducted by the MECP and results are provided to the health department. If results indicate the presence of blue-green algae, the department notifies the public by posting water-quality advisory signs in the affected area.

Blue-green algae are microscopic, plantlike organisms that occur naturally in ponds, rivers, lakes and streams. Although often blue-green in colour, the algae can also be olive-green or red. Residents are advised to be cautious near blue-green algae because some blue-green algae can produce toxins that may be harmful to humans who drink, fish or bathe in the water.

Should a blue-green algal bloom occur, people can protect themselves and their pets by not swimming or playing in areas where water is discoloured, or where foam, scum or mats of algae on the water’s surface are present. People and pets should not swim, play in or drink water in areas where an algal bloom is present. Consuming fish from areas where mats of algae are present and where a water quality advisory is posted is also not advisable.

For more information about blue-green algae or the health department’s beach monitoring program, visit www.durham.ca/beaches, or call the Environmental Help Line at 905-723-3818 or 1-888-777-9613.