Burgess Hill Water Hardness & Quality Report (2026)

Burgess Hill, the Mid-Sussex town on the northern flank of the South Downs between Haywards Heath and Brighton, is served by South East Water, which extracts supply from deep boreholes sunk into the Brighton Chalk Block — the thick, unconfined Cretaceous Chalk Aquifer that underlies the entire Mid-Sussex coastal plain and the South Downs. The chalk here attains exceptional thickness and purity, and the aquifer is one of the most productive in southern England. Water is treated at Falmer Water Treatment Works near Brighton and at Plumpton Water Treatment Works in the Mid-Sussex chalk country, then distributed north through the Burgess Hill, Haywards Heath and East Grinstead supply zones. The extraordinary TDS of 979.5 mg/L reflects a supply heavily dominated by long-residence chalk groundwater with very high calcium bicarbonate saturation.

The South Downs Chalk beneath Burgess Hill is thickly developed and unconfined, with an extensive recharge area stretching northward across the Weald. Rainwater percolates down through the chalk over years, dissolving calcium carbonate from the bioclastic matrix. In the deeper, unconfined sections beneath the Mid-Sussex coastal plain, groundwater achieves concentrations of 320–340 mg/L before being abstracted. The Brighton Chalk Block is distinct from the narrower chalk outcrops further west; its greater thickness and the long flow paths from the Weald recharge area to borehole abstraction points near the coast result in some of the hardest chalk groundwater in southern England.

At 333.5 mg/L Burgess Hill's tap water is extremely hard and limescale dominates household maintenance. Kettle elements develop a substantial white crust within a week and require weekly descaling with a concentrated citric acid solution. Shower screens and glass panels fog with limescale rapidly; daily wiping with a squeegee and weekly treatment with white vinegar or a commercial limescale spray is the standard routine. Combi-boilers face significant scaling risk and inline magnetic inhibitors plus annual servicing are essential. Washing-up liquid must be used generously. A whole-house water softener is strongly recommended in Burgess Hill and is widely fitted in the area.