Boisbriand Water Hardness & Quality Report (2026)

Boisbriand's drinking water is managed by Ville de Boisbriand, a north Montreal suburb in the Laurentides region just north of the Thérèse-De Blainville MRC on Highway 15, drawing from the regional Laurentides water supply system. Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) requirements. Hardness measures 112.5 mg/L (6.6 gpg) — classified as moderately hard by Health Canada, consistent with the Laurentides municipalities in the corridor between the Laurentian Shield and the Montreal metropolitan north shore.

Boisbriand's watershed or regional supply draws from the transitional landscape between the Precambrian Laurentian Shield highlands and the Ordovician limestone Lowlands of the Laurentides agricultural plain. At 112.5 mg/L, Boisbriand's supply is slightly harder than the immediately adjacent Blainville (70.5 mg/L from batch 9) and Saint-Jérôme (73 mg/L from batch 8), reflecting a distribution sub-zone or supply source with a proportionally higher calcareous Lowlands mineral contribution — perhaps from a local groundwater component drawing from the Lowlands carbonate aquifer beneath the Boisbriand plain.

At 112.5 mg/L, Boisbriand residents experience moderate scale deposits on kettle elements and in hot water tanks — descaling every six to eight weeks is adequate. Hot water tanks operate reliably at this hardness. Ville de Boisbriand publishes annual water quality reports following Ministère de l'Environnement standards. Health Canada lead precautionary guidance applies to residents in the community's pre-1975 housing stock in the older Boisbriand residential areas established in the 1960s and 1970s.