Snodland Water Hardness & Quality Report (2026)

Affinity Water supplies Snodland, the north Kent town in the Medway Valley — a community that grew rapidly from the 19th century with the establishment of large cement and paper works using the chalk and the Medway river together, now a residential community on the North Downs chalk dip slope between Maidstone and Rochester — from the North Downs Chalk (Cretaceous) aquifer boreholes in the Medway valley Kent supply zone, treated at East Farleigh Water Treatment Works near Maidstone. At 272.5 mg/L (19.1°Clark), Snodland's water is very hard — consistent with the productive Cretaceous Chalk aquifer of the North Downs Medway valley that delivers persistently very hard, mineralised groundwater to the Affinity Water north Kent distribution zone.

Snodland sits in the Medway Gap where the North Downs Chalk escarpment is cut by the Medway. Affinity Water draws from deep North Downs Chalk boreholes in the Medway valley supply zone, producing 272.5 mg/L with TDS 694.3 mg/L — very hard water with a moderate TDS/hardness ratio (2.55) consistent with Greensand sulphate contribution beneath the chalk, comparable to Maidstone (271 mg/L) and Rochester in the same Affinity Water north Kent Medway chalk supply zone.

At 272.5 mg/L, limescale is a persistent and significant household problem in Snodland. Kettles should be descaled every two to three weeks. The combi-boiler needs a fitted scale inhibitor and annual professional servicing. Washing-up liquid requires generous quantities for adequate lather. Taps and shower heads develop substantial white chalk deposits within a week to ten days; a fortnightly descaling with white vinegar or a proprietary product keeps fittings in good condition. Snodland's very hard North Downs chalk supply is a product of the same geology that powered the cement works — the Medway chalk that built Victorian London also mineralising the water in every household in this north Kent town.