Worthing Water Hardness & Quality Report (2026)

Southern Water provides mains water to Worthing and the wider West Sussex region, drawing primarily from groundwater. This supply is abstracted from boreholes tapping into the South Downs Chalk aquifer. Water treatment takes place at local facilities, where the raw water is filtered, disinfected using chlorination, and rigorously monitored to meet stringent UK drinking water standards. Southern Water performs extensive quality checks throughout its supply network across South East England, ensuring the water delivered to residents is safe and meets all regulatory requirements.

The Chalk aquifer, a major groundwater source in southern England, lies beneath the South Downs. This Cretaceous-age formation consists of porous white limestone abundant in calcium carbonate. As rainwater percolates through these rock layers, it naturally dissolves minerals, imparting a high mineral content to the groundwater. The geology, particularly the limestone bedrock, is responsible for yielding a very hard water supply, characteristic of the downland regions in southeastern England.

Frequent limescale buildup is a common consequence of this very hard water, affecting appliances like kettles, boilers, washing machines, and showerheads. This buildup not only reduces efficiency but also shortens the lifespan of these household items. Homeowners often find that regular descaling with solutions of vinegar or citric acid helps maintain taps and heating elements. To combat scum formation, improve soap lathering, and extend appliance longevity, installing a water softener is highly recommended for households in the Worthing area. Southern Water offers hardness checkers and detailed reports on their website.