Westminster-Branson Water Hardness & Quality Report (2026)

Westminster-Branson (a north Toronto neighbourhood centred on Wilson Avenue and Bathurst Street, incorporating the Branson Hospital area and the dense apartment corridor between Dufferin and Allen Road) receives its drinking water from the City of Toronto, drawing from Lake Ontario via the F.J. Horgan Water Treatment Plant. Water is treated using ozonation, biofiltration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) standards. Hardness in this distribution zone is 235 mg/L (13.7 gpg) — classified as very hard by Health Canada, with TDS of 595 mg/L, consistent with the north Toronto distribution corridor.

Westminster-Branson receives F.J. Horgan plant Lake Ontario supply through the north Toronto distribution network — sharing the characteristically very hard Lake Ontario source (dissolved Silurian and Devonian carbonate from the Great Lakes basin) with all other Toronto supply zones. The 235 mg/L is consistent with the adjacent Glenfield-Jane Heights (238 mg/L) and Downsview-Roding-CFB (238.5 mg/L) in the same northwest corridor.

At 235 mg/L, Westminster-Branson residents face persistent scale challenges — kettle and showerhead descaling every one to two weeks is typical. The area's dense high-rise apartment corridor on Wilson Avenue and Bathurst Street includes many buildings constructed in the 1960s–1970s where the City of Toronto's lead service line replacement programme is relevant. Residents and building managers are encouraged to review lead service line status at toronto.ca/water and follow Health Canada guidance applicable to this characteristically very hard north Toronto supply zone.