Markland Wood Water Hardness & Quality Report (2026)

Markland Wood receives its water from the City of Toronto's York Water System, primarily drawing from Lake Ontario. This vast source, part of the Great Lakes Basin, is supplemented by water from the Lake Simcoe basin. Treatment occurs at major facilities like the R.C. Harris Water Treatment Plant and the F.J. Horgan Plant, with York Region also utilizing the James E. Kerr facility for Lake Simcoe water. The combined supply serves over 1.2 million residents across parts of Peel Region and York Region within the Greater Toronto Area.

The region's water flows through or over Paleozoic limestone and shale formations dating back to the Ordovician and Silurian periods. These sedimentary rocks, including the Georgian Bay Formation and Lindsay Limestone, are laden with calcium and magnesium carbonates. As surface water interacts with limestone runoff and groundwater percolates through these mineral-rich layers, particularly within aquifers associated with the Oak Ridges Moraine, these dissolved minerals contribute significantly to the water's hardness.

Homeowners in Markland Wood may notice scale buildup in pipes, which can impede water flow and reduce the efficiency of appliances. Devices like kettles, water heaters, dishwashers, and washing machines are particularly susceptible to mineral deposits, leading to shorter lifespans and increased energy consumption. To combat this, regular descaling with vinegar for fixtures and annual flushing of hot water tanks are advised. Given the supply's hardness, installing a whole-home water softener is often recommended to prevent limescale and improve the lathering of soaps and detergents. The water is treated to meet Ontario Drinking Water Standards, with a pH typically between 7.5 and 8.2 following lime softening.