Blandford Forum Water Hardness & Quality Report (2026)

Wessex Water supplies Blandford Forum, the elegant Georgian market town on the River Stour in north Dorset — rebuilt in a remarkably unified Georgian Baroque style after the catastrophic fire of 1731 by the architect brothers John and William Bastard, earning it a place among England's finest planned Georgian streetscapes — from Dorset Chalk aquifer boreholes in the upper Stour Valley supply zone, treated at Gillingham Water Treatment Works in north Dorset. At 187.5 mg/L (13.2°Clark), Blandford Forum's water is hard — consistent with the productive Cretaceous Upper Chalk of north Dorset that delivers moderately hard calcium bicarbonate groundwater to the upper Stour Valley communities.

Blandford Forum sits in the Stour Valley chalk corridor where the Cretaceous Upper Chalk provides the principal aquifer for the north Dorset water supply. Wessex Water draws on chalk boreholes in the upper Stour Valley supply zone, yielding 187.5 mg/L with TDS 462.9 mg/L — hard water consistent with the north Dorset chalk belt from Shaftesbury and Gillingham through Blandford Forum to Wimborne Minster in the same Wessex Water upper Stour chalk distribution zone.

At 187.5 mg/L, limescale is a consistent household challenge in Blandford Forum. Kettles benefit from descaling every three to four weeks. The combi-boiler should be fitted with a scale inhibitor and serviced annually. Washing-up liquid requires more product per wash. Taps and shower heads develop visible white limescale deposits within one to two weeks; a fortnightly wipe with white vinegar or a proprietary descaling product keeps fittings clean. The hard Dorset chalk supply at Blandford Forum is a constant feature of daily domestic life in this Georgian townscape — less visible than the Bastard brothers' architecture, but equally immovable and characteristic of north Dorset's chalk landscape.