Warning signs are being removed, but officials are still recommending people avoid algae in and around Belwood Lake.
On Aug. 12 the Grand Rover Conservation Authority (GRCA) issued warnings and posted signs advising people to be cautious around the water due to health risks associated with blue-green algae.
The algae contain a toxin called microcystin that can cause skin rashes after contact or illness when ingested by people or animals.
However, after an Aug. 17 sample "showed non-detectable levels of microcystin," the GRCA announced it is removing the signs.
"Lake users should continue to avoid algae mats on the shoreline, algae 'scum' floating on the surface or any other visible algae," the GRCA stated in a press release on Aug. 19.
The signs, posted by Wellington-Dufferin-Guelph Public Health, had warned lake users:
– don’t swim in the lake;
– keep children and pets away from the algae;
– avoid contact with the algae;
– don’t eat fish from the lake;
– don’t use the water for drinking or any other purpose; and
– boating is allowed, but boaters should avoid touching the algae.
There have been no reports of human illness caused by the algae.
GRCA officials say algae blooms occur naturally during hot dry weather, often increasing in frequency during late summer and early fall. Algae feed on phosphorous, a chemical found naturally in soil as well as in manure, fertilizers and human waste.
The GRCA will continue to monitor the reservoir and provide updates.
More information on blue-green algae is available at www.grandriver.ca.
