The boil water advisory for Vaudreuil-Dorion has been lifted.
Sunday, city officials warned residents to boil their water for at least one minute before consuming it, or to use bottled water.
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Officials said the advisory was triggered after a lab test yielded a positive E. coli result.
A breakdown in communication between the city and its residents left many unaware of the situation.
The automated phone calling system failed, with the warning only going out to about half of the intended recipients.