Residents in parts of Gatineau's Aylmer sector are being told to not drink or otherwise use their water.
The City of Gatineau issued the warning Tuesday afternoon after a "hydrocarbon odour" was detected during infrastructure work on Front Street.
The water is currently being tested and results are expected this evening, according to Yves Melanson, an official with the City of Gatineau.
The advisory was a preventative measure, Melanson said.
The affected area is bounded by Eardley Road, des Allumettières Boulevard, and Broad, Bagot, Gordon and North Streets. Officials do not expect the parimeter to spread.
Nearly 2,000 residents are affected by the water advisory, the City of Gatineau said.
Not even boiling the water will make it safe for consumption or use, the city said.
Residents are instead being asked to use bottled water for bathing, cooking, brushing and drinking.
Bottled water will be distributed tonight at the Paul-Pelletier Aquatic Centre, the city said. Showers there will be available until 10 p.m.