Agincourt North Water Hardness & Quality Report (2026)

Toronto Water, operated by the City of Toronto, supplies Agincourt North in the former Scarborough area of Toronto County, Ontario, Canada. The primary source is Lake Ontario, treated at the R.C. Harris Water Treatment Plant and Highland Creek Water Treatment Plant which serve eastern Toronto. These facilities process surface water from the lake, with minor contributions from local groundwater wells in some areas. The service covers the Agincourt North neighbourhood within the broader Toronto water distribution system. The water originates from the Lake Ontario watershed within the Great Lakes Basin.

Underlying geology features Silurian dolostone and Devonian limestone formations of the Niagara Peninsula and Oak Ridges Moraine, with surficial glacial deposits. Lake water contacts limestone runoff and shoreline aquifers, while any groundwater blends from fractured bedrock aquifers. This carbonate-rich Paleozoic geology imparts a moderately mineralised character to the supply through natural dissolution of alkaline earth metals.

Moderately hard water promotes scale buildup in pipes, water heaters, and dishwashers, reducing heating efficiency and causing spots on glassware. Kettles, coffee makers, and washing machines may experience reduced lifespan without maintenance. Regular vinegar descaling, low-flow fixtures, and annual heater flushing help mitigate these effects. A water softener is optional but recommended for homes with older plumbing or high water usage to prevent gradual damage. Toronto Water complies with lead and copper regulations via corrosion control and pipe replacement programs. Trace PFAS levels are below Health Canada guidelines, and occasional low-level iron/manganese from sediment is addressed by filtration.