The alarm has been raised about potential sewage contamination in a number of drains in Bothwell. 
Municipal officials say they were notified by the Ministry of Environment following tests done in May, 2017.
The affected drains are the Burke Drain, Burke Drain Extension and Dankey Creek Drain.
The Ministry has ordered signs be posted in the public access areas in the affected locations, and while there have been no reports of any adverse effects on human health, residents are advised to avoid direct contact with the waterways.
Municipal officials say the issue has no impact on local drinking water.