Laval residents in the Ste-Dorothée district can now use their tap water but officials warned Thursday it still isn’t safe to drink, even if boiled. City officials first put out a notice on Tuesday, telling residents not to use their tap water at all. The advisory was issued after firefighters extinguished a blaze in the area and contaminants were found in the water. City officials suspect one of the products used to extinguish the blaze entered the local water supply for a brief amount of time.