Ville-Émard Water Hardness & Quality Report (2026)

Ville-Émard (a working-class neighbourhood in Montréal's Sud-Ouest borough, centred on the Monk métro station area near Verdun and LaSalle, known for its Quebec francophone heritage and longtime industrial past) receives its drinking water through Ville de Montréal — Direction de l'eau potable, drawing from the St. Lawrence River via the Atwater Water Treatment Plant. Treatment includes ozonation, biofiltration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) standards. Hardness in Ville-Émard's distribution zone is 99.5 mg/L (5.8 gpg) — classified as moderately hard by Health Canada, at the upper end of the Montréal borough range for the Atwater plant service area.

Ville-Émard's 99.5 mg/L — slightly harder than typical central Montréal boroughs (70–85 mg/L) — reflects its position in the Sud-Ouest borough's distribution sub-zone, where supply from the Atwater plant draws a somewhat higher proportion of St. Lawrence direct mainstream flow. The Atwater plant intake receives water from the St. Lawrence River main channel near the Verdun–LaSalle waterfront, where the river's Ordovician limestone Lowlands mineral content moderates at 99–100 mg/L.

At 99.5 mg/L, Ville-Émard residents experience moderate scale deposits in kettles and on tap aerators — descaling every two months is adequate. Hot water tanks operate reliably at this hardness. Montréal's Direction de l'eau potable follows Ministère de l'Environnement standards; Ville-Émard's established Sud-Ouest housing stock, with a mix of characteristic Montréal flat-roofed duplexes and triplexes built largely before 1940, places residents at elevated lead risk — the City's Health Canada-compliant lead guidance and testing programme is important for residents throughout the neighbourhood.