Preston Centre Water Hardness & Quality Report (2026)

The municipal water supply for Preston Centre, located in the City of Cambridge within Waterloo Region, is drawn entirely from groundwater. This supply originates from a network of local wells that tap into regional aquifer systems beneath the Grand River watershed. While Preston Centre itself is a specific neighbourhood, the utility serves approximately 130,000 residents across Cambridge. Treatment is managed at wellhead facilities, primarily involving disinfection with chlorine and basic filtration. Unlike areas relying on surface water, Preston Centre's water doesn't undergo extensive treatment at large plants.

The geological makeup of the Grand River watershed significantly influences the water's character. Aquifers here are primarily composed of Devonian and Silurian dolomites and limestones, including formations like the Lockport and Guelph Groups. These Paleozoic rocks are known for their karstic features, meaning groundwater readily dissolves the abundant calcium and magnesium carbonates within them. This process imbues the groundwater with minerals, resulting in a characteristically hard water supply, a common trait for municipal wells in Southwestern Ontario.

Homeowners in Preston Centre will likely notice the effects of this very hard water, particularly limescale buildup. This mineral deposit can reduce the efficiency of hot water systems, kettles, and dishwashers by as much as 20-30% over time. You might also see calcium deposits forming on pipes and fixtures, which can shorten their lifespan and increase energy consumption. Regular descaling of appliances with vinegar can help, and some residents opt for professional pipe flushing every few years. Installing a water softener is often recommended to combat scale, improve cleaning, and extend the life of your appliances.