The advisory, expected to last at least 24 hours, came after test results at the Atwater filtration plant showed the water was not up to its usual standard, said Chantal Morissette, head of Montreal's water service.
The water in the Atwater reservoir was lowered for ongoing renovations. When it was raised, sediment was discovered in the water, and brown-colored water has been seen in household taps in several boroughs of the city, the Canadian Broadcasting Corp. reported.
"We're asking citizens to boil their water for everything that concerns drinking water, for preparing baby bottles, for brushing teeth, for washing vegetables and for making ice cubes," Morissette said.
LGBT community has 'bullied the American people': Bachmann
Ohio bar shooting arrested, charged with murder