Hove Water Hardness & Quality Report (2026)

Hove, forming the western part of the Brighton and Hove unitary authority on the East Sussex coast, is supplied by South East Water from the South Downs Chalk Aquifer. South East Water operates licensed borehole abstractions at multiple sites along and below the South Downs chalk escarpment, including at Falmer, Patcham, and the western Downs, sinking boreholes deep into the Cretaceous Upper Chalk that underlies the entire Brighton and Hove coastal plain. The chalk here is at its thinnest between the Downs crest and the sea, and the short groundwater flow path through highly soluble chalk produces extremely calcium-rich groundwater. Supply is treated at South East Water's Falmer and Patcham treatment facilities before distribution to Hove, Brighton, and the surrounding area.

Hove's exceptionally hard water — 329 mg/L (23.1°Clark) — ranks among the hardest domestic supplies in England, resulting from direct abstraction of South Downs Chalk Aquifer groundwater. The chalk beneath Hove is a thick Cretaceous Turonian Upper Chalk with very high permeability and porosity — groundwater percolating through this chalk dissolves very high concentrations of calcium carbonate, producing extremely calcium-rich water at borehole depth. The elevated TDS (959.8 mg/L) reflects a further contribution of dissolved sulphate from the chalk-flint matrix. The Drinking Water Inspectorate (DWI) classifies this supply as very hard, at the extreme upper end of the national scale.

Limescale is an extremely serious daily challenge in Hove. At 329 mg/L, thick white limescale forms in kettles within a week, requiring at least weekly descaling. Combi-boiler heat exchangers face very serious limescale risk — annual boiler servicing with a full limescale inspection is essential and a polyphosphate scale inhibitor is non-negotiable. Showerheads, taps, and shower screens accumulate very heavy limescale requiring aggressive regular treatment. Washing-up liquid lathers extremely poorly. A whole-house water softener is strongly recommended for Hove homeowners and is an excellent investment against appliance damage.