Caledon Water Hardness & Quality Report (2026)

The Region of Peel Water Quality Team is responsible for the drinking water supplied to Caledon, serving communities such as Palgrave, Caledon East, Caledon Village, and Alton. This supply originates from numerous groundwater wells, not from surface reservoirs or rivers, with a total capacity supporting thousands of residents throughout Caledon's rural and village areas. Treatment processes at local facilities guarantee adherence to the Ontario Drinking Water Quality Standards. The water's journey begins within the Humber River watershed, passing through Ordovician bedrock composed of limestone and shale, part of the Simcoe Group, and overlaying Quaternary glacial deposits. These local aquifers draw from fractured bedrock and overburden sands, dissolving minerals from the carbonate rocks, which ultimately give the groundwater its moderately hard quality. This geological makeup results in naturally mineralized water, with its chemistry unaffected by dilution from surface runoff.

Homeowners in Caledon may notice scale buildup on appliances like hot water heaters, dishwashers, and washing machines, potentially reducing their efficiency and leading to staining in sinks and toilets. Routine upkeep, including descaling with vinegar and flushing water heaters, can help manage these issues. For those experiencing persistent soap scum, spotting, or accelerated wear on their equipment, installing a water softener is often recommended to prolong appliance life and enhance cleaning effectiveness. Peel Region’s 2023 reports confirm that all water supplies meet Ontario standards, with lead levels consistently below 0.01 mg/L. Comprehensive testing covers organics, inorganics, and microbes, supported by disinfection, filtration, and corrosion control measures during treatment. No specific concerns regarding PFAS or copper were noted, and the pH remains stable throughout distribution. Groundwater disinfection is a key safety measure for supplies like Palgrave and Caledon Village.