Bordon Water Hardness & Quality Report (2026)

South East Water provides the supply to Bordon and nearby areas in East Hampshire, UK. This utility serves millions across Kent, Sussex, and Hampshire, drawing its water mainly from groundwater boreholes. These boreholes tap into the local Chalk aquifer, with significant abstraction points situated near Petersfield and Alton in the Hampshire Downs. Water treatment is carried out at facilities like the Bordon Water Treatment Works, where processes such as filtration, chlorination, and fluoridation are employed to ensure the water meets drinking standards. Unlike some regions, this supply does not rely on surface reservoirs or rivers as primary sources.

The water originates from the Chalk aquifer within the Northern South Downs Chalk Group, a significant karstic formation dating back to the Late Cretaceous period. This permeable limestone, often containing flint nodules and capped by Palaeogene Reading Beds, allows rainwater to percolate deeply. As the water travels through these soluble calcareous rocks, it dissolves high concentrations of calcium and magnesium ions. This geological process is responsible for the characteristically hard water profile typical of groundwater sources in the Hampshire Basin and the Weald.

Homeowners in Bordon may notice limescale buildup in appliances like kettles and boilers, which can decrease their efficiency and lead to higher energy bills. Showers and faucets can also be affected by scale. The effectiveness of soap lathering is reduced, often requiring more detergent for cleaning tasks. To manage these effects, regular descaling with solutions like vinegar or citric acid can help. Wiping down fixtures after use and installing limescale filters on taps are also beneficial. For significant hardness, installing a water softener is advisable to protect plumbing and extend the lifespan of household equipment.