Fallingbrook Water Hardness & Quality Report (2026)

The City of Markham supplies drinking water to Fallingbrook, a neighbourhood within York Region, Ontario. Most of the water comes from Lake Ontario, a vast reservoir within the Great Lakes watershed. This surface water is then directed to the Markham Water Treatment Plant in the Unionville area for processing. There, it undergoes several stages, including screening, coagulation, flocculation, sedimentation, filtration, and disinfection using chloramine. The utility serves a significant population, distributing the treated water through an extensive network of underground pipes across Markham and neighbouring communities.

Fallingbrook's water originates from Lake Ontario's watershed, specifically the Toronto embayment. Geologically, the area is underpinned by Ordovician-Silurian limestone and dolomitic limestone formations belonging to the Simcoe Group. These ancient carbonate bedrock layers are the primary reason for the water's mineral content. As water flows over and through these rock formations, it dissolves minerals like calcium and magnesium, leading to a characteristically hard water supply. Tributaries feeding Lake Ontario and any groundwater sources in the region would also be influenced by this mineral-rich bedrock.

Residents in Fallingbrook may notice the effects of hard water, such as scale buildup in appliances like water heaters, dishwashers, and coffee makers, which can decrease their efficiency and shorten their lifespan. You might also observe soap scum residue and spots on glassware after washing. To combat mineral buildup, homeowners often flush their water heaters annually and descale fixtures with vinegar. Given the water's hardness, installing a water softener is frequently recommended to mitigate scale formation and prolong the life of household appliances. Markham's water quality consistently meets provincial standards, with typical pH levels between 7.5 and 8.2.