Junction Area Water Hardness & Quality Report (2026)

Junction Area (a west Toronto neighbourhood at the Keele Street and Dundas West intersection — the historic 'Junction' neighbourhood, named for the railway junction where four lines converged in the early 20th century, a vibrant working-class community of Victorian storefronts and semi-detached homes that has transformed into one of Toronto's most popular urban village strips, with the Dundas West craft brewery corridor, Keele Street record stores, and an active arts community in the former stockyard-district streets) 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 237.5 mg/L (13.9 gpg) — classified as very hard by Health Canada, consistent with the west Toronto supply corridor.

Junction Area receives F.J. Horgan plant Lake Ontario supply through the west Toronto distribution network — the same characteristically very hard Lake Ontario source (dissolved Silurian and Devonian carbonate from the Great Lakes basin) as all Toronto boroughs. The 237.5 mg/L is consistent with the adjacent Edenbridge-Humber Valley (237.5 mg/L) and Little Portugal (236 mg/L) in the Dundas West–Keele west Toronto F.J. Horgan distribution corridor.

At 237.5 mg/L, Junction Area residents face persistent scale challenges in this neighbourhood's dense Victorian rowhouses and commercial heritage buildings — kettle and showerhead descaling every one to two weeks is typical. The City of Toronto provides water quality information at toronto.ca/water. Health Canada lead service line precautionary guidance is strongly applicable in the Junction's Victorian-era housing stock, where original 1900s–1920s lead service connections are common in the established residential streets west of Keele.