Bayview Woods-Steeles Water Hardness & Quality Report (2026)

Bayview Woods-Steeles (a north Toronto neighbourhood at Bayview Avenue and Steeles Avenue — a prosperous suburban residential area at the extreme north edge of Toronto bordering Markham, with large detached homes on winding streets in a heavily treed environment, a neighbourhood popular with Jewish, East Asian, and established Toronto professional families, adjacent to the Earl Bales Park ravine system, the Bayview Village community, and the Bayview-Steeles commercial corner) 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 is 235 mg/L (13.7 gpg) — classified as very hard by Health Canada, consistent with the north Toronto supply corridor.

Bayview Woods-Steeles receives F.J. Horgan plant Lake Ontario supply through the north Toronto distribution — the same characteristically very hard Lake Ontario source (dissolved Silurian and Devonian carbonate from the Great Lakes basin) as all Toronto boroughs. The 235 mg/L is consistent with the adjacent Lawrence Park North (235 mg/L from batch 26) and Hillcrest Village (269.5 mg/L) northern Toronto distribution zones.

At 235 mg/L, Bayview Woods-Steeles residents face persistent scale challenges — monthly to bimonthly kettle and showerhead descaling is typical. Hot water tanks benefit from periodic inspection and flushing. The City of Toronto provides multilingual water quality information at toronto.ca/water. Health Canada lead precautionary guidance applies to pre-1975 properties in the established Bayview Woods residential streets.