Brandon Water Hardness & Quality Report (2026)

Brandon's drinking water is managed by the City of Brandon, drawing from the Assiniboine River via the Brandon Water Treatment Plant on the river's north bank. Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, fully meeting the Guidelines for Canadian Drinking Water Quality (GCDWQ). Hardness measures 200 mg/L (11.7 gpg) — classified as very hard by Health Canada, reflecting the Assiniboine River's accumulation of calcium from the highly calcareous Cretaceous and Devonian carbonate Prairie terrain of southwestern Manitoba.

The Assiniboine River drains the southern Manitoba and eastern Saskatchewan Prairie — a landscape underlain by Cretaceous Pierre Shale and Devonian carbonate formations of the Williston Basin and Manitoba Lowlands. The river collects runoff from calcareous glacial till covering the Prairie plain — till derived from the grinding of Cretaceous limestone and dolostone bedrock during the last glaciation — and from shallow groundwater interacting with the highly soluble Prairie carbonate geology. By the time the Assiniboine reaches Brandon, the accumulated calcium produces the 200 mg/L hardness characteristic of Manitoba's Prairie river cities.

At 200 mg/L, Brandon homeowners face persistent scale build-up on kettle elements, showerheads, and inside hot water tanks — monthly descaling is typical. Hot water tank elements accumulate scale within one to two years; annual inspection and flushing are strongly recommended. A whole-home water softener is a common household appliance in Brandon, representing a worthwhile long-term investment for appliance protection and reduced cleaning costs at this very hard Prairie level. The City of Brandon provides water quality information at brandon.ca.