Black Creek Water Hardness & Quality Report (2026)

Black Creek (a neighbourhood in northwest Toronto centred on Black Creek Drive and Jane Street near Finch Avenue West — one of Toronto's most socioeconomically challenged and diverse communities, home to significant Caribbean, West African, Somali, and South Asian populations in the Jane-Finch corridor's high-rise apartment towers) 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 594 mg/L, consistent with the northwest Toronto distribution corridor.

Black Creek receives F.J. Horgan plant Lake Ontario supply through the northwest Toronto distribution network — the same characteristically very hard Lake Ontario source (dissolved Silurian and Devonian carbonate from the Great Lakes basin) that supplies all Toronto boroughs. The 235 mg/L is consistent with the adjacent York University Heights (232.5 mg/L), Glenfield-Jane Heights (238 mg/L), and Downsview-Roding-CFB (238.5 mg/L from batch 11) in the same northwest corridor.

At 235 mg/L, Black Creek residents face persistent scale challenges — kettle and showerhead descaling every one to two weeks is typical. The City of Toronto provides multilingual water quality information at toronto.ca/water — particularly important for this community's highly diverse newcomer and immigrant population. The neighbourhood's 1960s–1970s high-rise apartment towers include many buildings where the City's lead service line programme and Health Canada precautionary guidance on plumbing are relevant for residents with young children.