Pelmo Park-Humberlea Water Hardness & Quality Report (2026)

Pelmo Park-Humberlea (a northwest Etobicoke neighbourhood at the Weston Road-Lawrence Avenue West junction — the Pelmo Park-Humberlea community of post-war bungalows and detached homes between Weston Road and the Humber River valley, adjacent to the Humber River ravine park and the Jane Street-Lawrence commercial corridor, a predominantly Italian-Canadian, Jamaican, and South Asian community in the established northwest Etobicoke residential belt, near the Humber Collegiate and the Pelmo Park recreational facilities) 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 237 mg/L (13.8 gpg) — classified as very hard by Health Canada, consistent with the standard northwest Etobicoke supply corridor.

Pelmo Park-Humberlea receives F.J. Horgan plant Lake Ontario supply through the northwest Etobicoke distribution — the same characteristically very hard Lake Ontario source (dissolved Silurian and Devonian carbonate from the Great Lakes basin) as all Toronto boroughs. The 237 mg/L is consistent with the standard northwest Etobicoke supply, much harder than the anomalously soft nearby Humber Summit sub-zone (173 mg/L from batch 31), confirming the different pipeline routing to this inner northwest Etobicoke sub-zone.

At 237 mg/L, Pelmo Park-Humberlea residents face persistent scale challenges — monthly to bimonthly kettle and showerhead descaling is typical. The City of Toronto provides multilingual water quality information at toronto.ca/water. Health Canada lead service line precautionary guidance applies to the neighbourhood's post-war bungalow and detached housing stock for pre-1955 properties in the established Pelmo Park-Humberlea area.