Gillingham Water Hardness & Quality Report (2026)

The water supply for Gillingham comes from South East Water, which draws from the North Downs Chalk Aquifer. This aquifer is accessed via boreholes located in the Medway valley. Gillingham, as one of the Medway towns, benefits from this deep groundwater source, which is then treated before distribution to residents. The utility manages the entire process from extraction to delivery, ensuring a consistent supply.

Gillingham sits within the North Downs Chalk Aquifer, a geological formation primarily composed of chalk. The chalk bedrock is known to be rich in calcium carbonate, a mineral that readily dissolves into groundwater. This process leads to the naturally high mineral content found in the water drawn from deep boreholes in the Medway valley, resulting in very hard water.

With water hardness at 22.2°Clark, you'll likely notice its effects on daily tasks. Soap and detergent won't lather as easily, and scale buildup can be a common issue in kettles, coffee makers, and especially your water heater. Regular descaling of appliances can help maintain their efficiency and longevity. If you're experiencing significant issues with scale or want to protect your plumbing, a whole-house water softener is often recommended.