Leaside-Bennington Water Hardness & Quality Report (2026)

Toronto Water supplies Leaside-Bennington, an East York neighbourhood in Toronto, Ontario, Canada, with treated drinking water for its over 2.9 million residents. The primary source is Lake Ontario, with water drawn through intake cribs and supplemented by groundwater in certain areas. Treatment occurs at major facilities like the R.C. Harris Water Treatment Plant and the F.J. Horgan Plant. These plants utilize filtration, chlorination, and advanced processes to ensure the water meets strict standards before entering the city's extensive distribution network.

The water's journey begins in the Great Lakes Basin, specifically the Lake Ontario watershed. It passes through Paleozoic carbonate rock formations, including Ordovician limestones and dolomites belonging to the Appalachian foreland basin. These sedimentary layers readily dissolve, releasing calcium and magnesium ions that contribute to a characteristically hard water supply. Overlaying this bedrock are glacial till and esker aquifers, which further influence the water's mineral content, primarily through continued limestone dissolution. This underlying geology consistently shapes the moderately mineralised to hard nature of Toronto's water.

Homeowners in Leaside-Bennington will likely notice scale buildup in pipes, which can restrict water flow and decrease the efficiency of appliances. Devices such as water heaters, dishwashers, and washing machines may have their lifespans shortened and consume more energy due to these mineral deposits. Common issues include soap scum on bathroom fixtures, spots on glassware after washing, and laundry feeling stiff or dry. To combat these effects, homeowners can regularly descale appliances, use vinegar for cleaning, and consider installing a water softener. Toronto Water actively manages pH between 7.2-8.0 with orthophosphate as a corrosion inhibitor to protect plumbing.