The preventative advisory affected about 150,000 residents in the eastern half of the island of Montreal south of Sherbrooke Street, including Mercier–Hochelaga-Maisonneuve, Rivière-des-Prairies–Pointe-aux-Trembles and Montréal-Est.
source https://www.cbc.ca/news/canada/montreal/boil-water-advisory-lifted-1.7297750?cmp=rss