Oakwood Village Water Hardness & Quality Report (2026)

Oakwood Village (a dense mid-Toronto neighbourhood near Eglinton Avenue West and Dufferin Street — a diverse, predominantly working-class and middle-income community with a large Jewish, Italian, Caribbean, and South Asian population, centred on the Bathurst/Eglinton intersection corridor and the Oakwood/Chaplin Crescent residential area) 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 185.5 mg/L (10.8 gpg) — classified as very hard by Health Canada, with TDS of 409 mg/L — notably softer than the typical Toronto central supply of 230–240 mg/L.

Oakwood Village's 185.5 mg/L — just above the 180 mg/L very hard threshold — is significantly softer than the adjacent Annex (222 mg/L from batch 13) and Rosedale-Moore Park (238 mg/L). The softer reading in this mid-west Toronto sub-zone, with a TDS of only 409 mg/L compared to the typical 590–610 mg/L across central Toronto, suggests a distinct distribution branch routing through the Davenport–Eglinton West corridor that may blend a different supply proportion than the main F.J. Horgan distribution. Similar intermediate hardness zones (Milliken 184 mg/L) appear across the Toronto distribution network.

At 185.5 mg/L, Oakwood Village residents experience regular scale deposits — monthly kettle descaling is typical but at a lower rate than western or central Toronto neighbourhoods. Hot water tanks operate well at this hardness. The City of Toronto provides water quality information at toronto.ca/water; the neighbourhood's dense pre-war housing stock and post-war apartment buildings along the Eglinton-Bathurst corridor include many pre-1945 properties where lead service line review is recommended.