Littlehampton Water Hardness & Quality Report (2026)

Southern Water provides drinking water to Littlehampton, located in West Sussex, by drawing from groundwater sources within the Chalk aquifer. This vital aquifer system spans the South East Basin and is fed by rainfall infiltrating the South Downs catchment. Water is abstracted from boreholes in the Arun Valley and surrounding downs, then treated at local facilities, including the Littlehampton Water Treatment Works. This utility serves a wide area across South East England, encompassing coastal towns and rural regions, with residents relying on these deep aquifer extractions for their daily supply.

The geology beneath Littlehampton is dominated by the Chalk Group, a porous limestone formation dating back to the Late Cretaceous period. This rock is naturally rich in calcium carbonate, and as rainwater percolates through it, these minerals dissolve, giving the groundwater its character. Underlying layers like the Upper Greensand Formation also contribute dissolved minerals. The region's geological makeup, characterized by these calcareous rocks and limestones, particularly within the Wealden anticline structures of West Sussex and East Sussex, is the reason for the water's inherent hardness, especially given the absence of surface water influences.

Homeowners in this area often notice limescale buildup on appliances like kettles, boilers, and showerheads, which can significantly reduce their efficiency and lifespan. This scale insulates heating elements in washing machines, dishwashers, and heating systems. Regular cleaning with household solutions like vinegar or citric acid can help manage deposits, as can keeping hot water temperatures below 60°C. For persistent issues, installing a water softener is a practical step to protect plumbing and extend the life of household equipment. Southern Water ensures the water meets UK standards, with typical pH levels between 7.2 and 7.6, and adheres to strict lead and copper limits set by the Drinking Water Inspectorate.