Bognor Regis Water Hardness & Quality Report (2026)

Bognor Regis in West Sussex, southeast England, gets its drinking water from South East Water. This utility draws from groundwater boreholes sunk into the regional chalk aquifer and also uses surface water from places like Bewl Water and Ardingly Reservoir. Treatment happens at facilities including the Bognor filtration works and other regional plants. The water's journey starts in watersheds like the Arun Valley catchment and the South Downs, where rain seeps through the ground.

The area is geologically situated within the Hampshire Basin, underlain by permeable Cretaceous chalk. These Upper and Lower Chalk layers, part of the Southern Uplands aquifer system, are rich in limestone. As rainwater filters through this bedrock, it picks up significant amounts of calcium and magnesium, leading to naturally hard water. The Lambeth Group's sands and clays also play a role in how water replenishes underground. Proximity to the coast means that in some shallower areas, saltwater can mix with the freshwater.

This naturally hard water can lead to noticeable limescale buildup inside kettles, boilers, and on showerheads, making appliances less efficient and potentially shortening their lives. You might see deposits in dishwashers and washing machines, affecting how well they clean. Stubborn scale can also form on bathroom fixtures. To combat this, homeowners often descale appliances with vinegar or citric acid. Keeping hot water systems below 60°C can help reduce scum formation. Many residents find that installing a water softener is the most effective way to protect plumbing and appliances from the effects of this mineral-rich supply.