Chatham Water Hardness & Quality Report (2026)

The Chatham-Kent Public Utilities Commission supplies water to the municipality of Chatham-Kent, drawing from a mix of sources. These include surface water influenced by Lake Erie runoff and regional groundwater aquifers. The utility operates several water treatment plants to process these raw supplies before they reach homes and businesses across the former City of Chatham and surrounding townships. This combined approach ensures a reliable water supply, managed under Ontario's Drinking Water Quality Management System.

The bedrock beneath Chatham-Kent is primarily Paleozoic limestone and dolomite, belonging to the Devonian and Silurian geological periods. This carbonate-rich geology means that groundwater, in particular, spends a long time in contact with these minerals. As the water flows through these formations, it picks up significant amounts of calcium and magnesium, leading to water that is generally hard. This is a common characteristic of water supplies throughout southwestern Ontario.

Homeowners in Chatham-Kent will likely notice scale buildup on faucets and showerheads, and may find that soap and detergents don't lather as effectively. Over time, mineral deposits can accumulate in water heaters and inside dishwashers, reducing their efficiency and lifespan. To combat these effects, the CKPUC suggests that residents consider installing a water softener. Simple maintenance, like regularly descaling kettles and faucet aerators, can also help manage the impacts of hard water.