Camberley Water Hardness & Quality Report (2026)

Camberley, the Surrey Heath town in the Blackwater valley on the Surrey–Hampshire border adjacent to Farnborough and Fleet, is served by Affinity Water. Supply to the Blackwater valley corridor draws on deep boreholes into the North Hampshire Chalk Aquifer, which extends north from the Hampshire downs beneath the sandy Bagshot Beds of north Surrey and Berkshire. Affinity Water's south-east region operates chalk boreholes at Farnborough, Fleet and the Blackwater valley to serve this hard-water corridor. Water is treated at Farnborough Water Treatment Works before distribution through the north-east Hampshire and south-west Surrey supply network. The very high TDS of 803.7 mg/L reflects long-residence deep chalk groundwater carrying concentrated calcium bicarbonate and sulphate ions beneath the Surrey heath country.

The North Hampshire and Surrey Chalk is confined below Palaeocene Thanet Sands and Eocene Bagshot Beds across the Camberley area, creating conditions for very long groundwater residence times and extreme chalk dissolution. Unlike the shallow unconfined chalk of the North Downs directly to the east, the confined chalk beneath the Blackwater valley retains water for decades to centuries, reaching calcium carbonate concentrations of 280–290 mg/L in boreholes. The additional sulphate contribution from the Reading Formation and deeper mineralised chalk layers explains the TDS far exceeding the hardness equivalent alone.

At 284.5 mg/L Camberley's water is very hard and limescale management is an intensive household task. Kettle elements develop a white crust rapidly — fortnightly descaling with a citric acid solution is a minimum requirement. Shower screens and glass bathroom panels need weekly treatment with a limescale remover spray to maintain clarity. Washing-up liquid consumption is high. Combi-boilers face significant scaling risk and should have magnetic scale inhibitors installed; annual power-flushing is advisable. Given Camberley's garrison town heritage with older housing stock, fitting a whole-house water softener is a particularly wise investment.