North Riverdale Water Hardness & Quality Report (2026)

North Riverdale (a historic east Toronto neighbourhood centred on Broadview Avenue and the Danforth corridor — the neighbourhood above Riverdale Farm and the Broadview-Danforth intersection, an affluent and culturally vibrant community of Victorian rowhouses and semi-detached homes on the east bank of the Don River valley, adjacent to the Riverdale Farm, Riverdale Park West, and the scenic Broadview Avenue-Parliament Street ridge overlooking downtown Toronto and the Don River ravine, a neighbourhood of young professionals, families, and artists who have made North Riverdale one of Toronto's most desirable east-end addresses near the Greektown Danforth) receives its drinking water from the City of Toronto, drawing from Lake Ontario via the R.C. Harris 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 238.5 mg/L (13.9 gpg) — classified as very hard by Health Canada, consistent with the standard east Toronto supply.

North Riverdale receives R.C. Harris plant Lake Ontario supply through the east 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 238.5 mg/L is consistent with Palmerston-Little Italy (238.5 mg/L from batch 28) and the standard east Toronto supply corridor.

At 238.5 mg/L, North Riverdale residents face persistent scale challenges in the neighbourhood's Victorian rowhouses — monthly to bimonthly kettle and showerhead descaling is typical. The City of Toronto provides water quality information at toronto.ca/water. Health Canada lead service line precautionary guidance strongly applies to North Riverdale's 1880s–1920s Victorian housing stock.