Estevan Water Hardness & Quality Report (2026)

Estevan's drinking water is managed by the City of Estevan, drawing from the Rafferty Reservoir on the Souris River — Estevan is the 'Energy City' of Saskatchewan in the far southeast corner of the province near the US border, the centre of Saskatchewan's coal-fired electrical power industry (Boundary Dam Power Station and Shand Power Station, including Canada's first commercial carbon capture facility), the Southeast Saskatchewan oil patch, and one of the sunniest cities in Canada (the 'Sunshine Capital' with over 2,400 hours of annual sunshine). Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, fully meeting the Guidelines for Canadian Drinking Water Quality (GCDWQ). Hardness measures 122.5 mg/L (7.2 gpg) — classified as hard by Health Canada, notably softer than other Saskatchewan cities (Regina 416–418 mg/L, Saskatoon 411–413 mg/L), reflecting the Rafferty Reservoir local Souris River watershed supply.

Estevan draws from the Rafferty Reservoir — a reservoir built by SaskWater on the Souris River in the 1990s, partly to provide reliable municipal water supply for Estevan and the southeast Saskatchewan region. The Souris River drains the southeast Saskatchewan plains, carrying dissolved minerals from the Cretaceous shale and glacial till of the Missouri Coteau, but at lower concentrations than the Buffalo Pound Lake (Regina) and South Saskatchewan River (Saskatoon) supplies. The 'mixed' waterSource designation confirms a blended supply including the Rafferty surface water and local groundwater components.

At 122.5 mg/L, Estevan homes experience moderate scale deposits — monthly kettle and showerhead cleaning is recommended. Hot water tanks benefit from periodic inspection. The City of Estevan provides water quality information at estevan.ca. Health Canada lead precautionary guidance applies to pre-1975 properties in the historic Estevan downtown near the Civic Auditorium and the established residential streets.