Saint-Hubert Water Hardness & Quality Report (2026)

The Ville de Longueuil provides water service to the Saint-Hubert borough, a community within the greater Longueuil agglomeration in Montérégie, Quebec. Most of the water comes from the St. Lawrence River, which is processed at the Samuel-de-Champlain treatment plant. Local aquifers also contribute to the supply, supplementing the surface water. This mixed water source serves residential, commercial, and institutional customers throughout Saint-Hubert. Daily tests are conducted across the entire water distribution network to ensure quality and safety for all users.

The region's geology is defined by the St. Lawrence Lowlands, with underlying Ordovician bedrock formations like the Beekmantown Group dolomites and limestones. These carbonate rocks are covered by glacial sands and clays deposited during the Champlain Sea era. Fractured bedrock aquifers, including the Potsdam Sandstone formation, are utilized for groundwater. While the weathering of these carbonate rocks adds minerals like calcium and magnesium, the water is generally soft to moderately mineralized. This is due to dilution from the St. Lawrence River and the buffering effect of the glacial sediments.

This soft water profile means you'll likely see less scale buildup inside pipes, water heaters, and various fixtures. Appliances like dishwashers and washing machines tend to operate more efficiently, and you might notice less spotting on glassware after it’s been washed. You probably won't need a water softener, but it's still a good idea to keep an eye on your copper plumbing for any signs of corrosion and remember to change filters regularly. For those who enjoy doing laundry, this water quality is excellent for getting clothes clean without needing special additives.