Ontario's Health Ministry is warning consumers to steer clear of bottled water manufactured by a Caledon-based company.

It says samples taken from Blue Glass Water Co. Ltd.'s products have been found to be "heavily contaminated with bacteria."

The province's chief medical officer, Dr. Arlene King, is also warning businesses not to serve water from the company, which is also known as Caledon Clear Water Corp.

"I am strongly advising the public and businesses to avoid consuming or offering for sale any bottled water produced by Blue Glass Water Co. Ltd.", King said. "Testing has confirmed bottled water manufactured by the operator was heavily contaminated with bacteria and could cause illness."

A ministry statement says Blue Glass Water was ordered to stop its operations related to bottling, processing and distributing water on July 25.

But public health units continue to see the water in food establishments in Toronto, Hamilton and Niagara.

The bottles may be blue, green or clear glass in 375 or 750 millilitre versions.