Saint-Charles-Borromée Water Hardness & Quality Report (2026)

Saint-Charles-Borromée's drinking water is managed by Ville de Saint-Charles-Borromée, drawing from a local Lanaudière river or reservoir source adjacent to Joliette — one of the main residential municipalities of the greater Joliette area in Lanaudière, a fast-growing north-Montreal suburb serving as the commercial and administrative hub of Lanaudière region, home to the Festival de Lanaudière (Canada's premier classical music festival, held in the remarkable outdoor amphitheatre of the Joliette area). Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) requirements. Hardness measures 109 mg/L (6.3 gpg) — classified as moderately hard by Health Canada, consistent with the Rivière L'Assomption watershed supply in the Joliette sub-zone.

Saint-Charles-Borromée's 109 mg/L is harder than L'Assomption town (59 mg/L from batch 24 — further south in the same watershed), reflecting the specific Joliette-area sub-zone which draws from a more mineralised portion of the Rivière L'Assomption system or a local groundwater source with greater carbonate influence from the St. Lawrence Lowlands limestone terrain in the Joliette plateau. The Lanaudière region transitions from the soft Shield in the north to the harder St. Lawrence Lowlands in the south, and Joliette's position at this transition produces intermediate hardness values.

At 109 mg/L, Saint-Charles-Borromée homes experience moderate scale deposits — cleaning every two months is adequate. Hot water tanks have a reliable operational lifespan. Water quality reports are published following Ministère de l'Environnement standards. Health Canada lead precautionary guidance applies to pre-1975 residential properties in the established Joliette suburban neighbourhoods.