New Toronto Water Hardness & Quality Report (2026)

Toronto Water supplies the New Toronto neighbourhood, a part of the city's west end. The water originates from Lake Ontario, drawn through four offshore intake cribs. Major treatment facilities, the R.C. Harris Water Treatment Plant and the F.J. Horgan Water Treatment Plant, process this supply. These plants utilize filtration, chlorination, and fluoridation to provide safe drinking water to more than 500,000 residents in the western service area, which includes New Toronto.

The watershed feeding Lake Ontario extends across the Ontario-New York border, receiving water from the Niagara River and other Great Lakes. Beneath the basin lie Paleozoic bedrock formations, including Ordovician Queenston Formation shales and limestones. Glacial till and eskers contribute to minor aquifers. The water's softness is a direct result of significant glacial erosion that diluted mineral content, limited contact with carbonate-rich rock layers, and the lake's natural buffering capabilities, which keep dissolved solids low.

Because the water is soft, homeowners might notice minor scale buildup on items like kettles, faucets, and water heaters over time. You may also see occasional spots on glassware after it comes out of the dishwasher. Appliances such as coffee makers and humidifiers can become less efficient if limescale accumulates. Routine descaling with vinegar and regular filter cleaning usually manage these issues effectively. For most households in New Toronto, a water softener isn't necessary, thus avoiding potential downsides like added sodium or overly slippery showers. The tap water's pH is maintained between 7.5 and 8.2 to help prevent pipe corrosion, or at least minimize, pipe corrosion.