Keelesdale-Eglinton West Water Hardness & Quality Report (2026)

The City of Toronto provides water to the Keelesdale-Eglinton West neighbourhood through its Toronto Water division. This supply primarily comes from Lake Ontario, with water treated at both the R.C. Harris Water Treatment Plant and the Island Water Treatment Plant. The distribution network serves residents within the former City of York, now part of Toronto, Ontario, Canada. This extensive system relies on the Lake Ontario watershed, which receives water from the Niagara River and direct precipitation.

Beneath the surface, the geology is dominated by Silurian-era carbonate rocks, specifically the Lockport and Guelph Formations. These dolomites and limestones, part of the Niagara Escarpment region's bedrock, naturally contribute dissolved minerals like calcium and magnesium to the water. This prolonged contact with carbonate rock formations is the reason for the mixed surface and groundwater supply's moderately mineralised, or moderately hard, character.

This moderately hard water can lead to some scale buildup in appliances like water heaters, dishwashers, and coffee makers, potentially affecting their efficiency over time. You might also notice spots on fixtures, and soap may not lather as readily, which can sometimes leave skin and hair feeling drier. Homeowners often find that regular descaling with vinegar helps maintain appliance performance, and many choose to install a water softener to extend the life of their equipment and improve cleaning effectiveness.