The City of Hamilton is advising residents to avoid contact with the water in Chedoke Creek and Cootes Paradise due to a high level of contamination.
The city says the source is unknown.
Crews are inspecting sewers and looking upstream for the potential cause.
The Royal Botanical Gardens (RBG) has removed the docks at Cootes Paradise.
Get weekly health news
Receive the latest medical news and health information delivered to you every Sunday.
By providing your email address, you have read and agree to Global News' Terms and Conditions and Privacy Policy.
Warning signs are being installed at public access points along the shoreline of the affected area.
Public Health Services says warm water and soap should be used to wash off if water from the contaminated area comes in contact with skin.
Comments
Want to discuss? Please read our Commenting Policy first.