Map of lead service lines

Last updated November 30, 2022

Would you like to know if your home’s water service line is made of lead? Check out our interactive map and see the results of service line screening in Montréal.


Results shown on the map are based on all screening operations carried out within city limits between 2007 and 2022. Screening shows us whether there is lead in the tap water.

For buildings that have not been screened yet, results are based on the year of construction (before 1970) and the number of dwellings (fewer than eight).

Data on water fountains and replacements of lead water service lines are not included in the results being presented.

Last update includes 2022 screening results.