Boucherville Water Hardness & Quality Report (2026)

Boucherville's drinking water is managed by Ville de Boucherville, a prosperous south shore suburb directly east of the Island of Montréal, drawing from the St. Lawrence River via the municipal water treatment plant on the Boucherville–Longueuil waterfront. Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) requirements. Hardness measures 77 mg/L (4.5 gpg) — classified as moderately hard by Health Canada, consistent with the south shore Montréal corridor's characteristic moderately hard St. Lawrence supply.

Boucherville's St. Lawrence River intake draws from the broad south channel between the south shore and the Île de Montréal, at a point where the river carries the accumulated dissolved calcium of the Great Lakes basin and the Ordovician limestone Lowlands plain. The 77 mg/L is characteristic of the south shore Longueuil–Boucherville supply zone, very similar to Saint-Hubert (75.5 mg/L from batch 5) and Le Vieux-Longueuil (73 mg/L from batch 3), reflecting the uniform St. Lawrence source chemistry across the eastern metropolitan south shore.

At 77 mg/L, Boucherville residents experience moderate scale deposits in kettles and on tap aerators — descaling every two to three months is typically adequate. Hot water tanks operate reliably at this hardness without dedicated treatment. Ville de Boucherville provides annual water quality reports following Ministère de l'Environnement standards; residents in the town's heritage waterfront quarter and older south shore housing stock are encouraged to follow Health Canada lead precautionary guidance applicable to pre-1975 properties.