Eringate-Centennial-West Deane Water Hardness & Quality Report (2026)

Eringate-Centennial-West Deane in Etobicoke, part of the City of Toronto, gets its drinking water from York Region's extensive system. This supply is primarily drawn from Lake Ontario, with about 80% coming through treatment facilities operated by the City of Toronto and the Region of Peel. The remaining portion is supplemented by local groundwater wells managed by York Region. Key treatment facilities involved include Toronto Water's R.C. Harris and Island plants for the Lake Ontario intake, alongside York Region's own groundwater treatment sites. This mixed water source serves a wide area, including this Etobicoke community within the Peel/York catchment zones, drawing from the vast Great Lakes-St. Lawrence River basin.

Geologically, the water originates from the Lake Ontario watershed, which is underlain by Paleozoic carbonate platforms. These include Ordovician limestone and shale sequences, such as those in the Simcoe Group, whose weathering releases alkaline earth metals into the water. Where groundwater is used, it filters through Quaternary glacial deposits sitting atop Devonian and Silurian dolomitic limestones. This interaction with mineral-rich bedrock, particularly limestone, significantly enriches the water with dissolved calcium and magnesium ions. Consequently, the supply is characterized as hard, with surface water moderately mineralized from basin runoff and groundwater more intensely so from prolonged contact with these rock formations.

This hard water can lead to scale buildup in household pipes, water heaters, and fixtures, diminishing the efficiency of appliances like water heaters and dishwashers and potentially shortening their lifespan. Homeowners often notice dry skin, soap scum that doesn't rinse away easily, and spotting on glassware. Regularly descaling faucets with vinegar can help, and a water softener is often recommended to combat these issues and protect modern appliances. While York Region states hardness poses no health risks, they suggest softeners for improved comfort and appliance longevity. Water quality tests confirm the supply meets provincial standards, with hardness being the main aesthetic concern.