Saint-Augustin-de-Desmaures Water Hardness & Quality Report (2026)

Saint-Augustin-de-Desmaures's drinking water is managed by Ville de Saint-Augustin-de-Desmaures, drawing from the St. Lawrence River or a local river source in the Capitale-Nationale region west of Quebec City — a rapidly growing western suburb of Quebec City, transitioning from a rural municipality to a high-growth residential community attracting families from Quebec City's urban core, with significant new residential development along the Autoroute 40 corridor. Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) requirements. Hardness measures 83.5 mg/L (4.9 gpg) — classified as moderately hard by Health Canada, consistent with the greater Quebec City area St. Lawrence supply character.

Saint-Augustin-de-Desmaures is west of Quebec City in the Capitale-Nationale region where the St. Lawrence River flows between the Appalachian south shore and the Laurentian north shore. The St. Lawrence at Quebec City is moderately hard — receiving runoff from the Laurentian Shield (north shore, soft inputs) and the Appalachian foothills (south shore, moderate inputs), producing a moderate blend. The 83.5 mg/L is consistent with the broader Quebec City area supply range and the St. Lawrence Lowlands geology of mixed carbonate and siliceous sedimentary terrain in the Quebec City corridor.

At 83.5 mg/L, Saint-Augustin-de-Desmaures homes experience light-to-moderate scale deposits — cleaning every two months is advisable. Hot water tanks have a good operational lifespan. Water quality reports are published following Ministère de l'Environnement standards. Health Canada lead precautionary guidance applies to older pre-1975 properties in the municipality's established original village areas, while the community's extensive new construction features modern plumbing throughout.