Hartshill Water Hardness & Quality Report (2026)

Severn Trent Water supplies Hartshill, a village in the Mease and Anker valleys in north Warwickshire near Nuneaton — set in the Anker Valley with quarrying and industrial heritage, at the fringe of the ancient Hartshill Hayes Country Park — from the Elan Valley Welsh aqueduct blended with Permo-Triassic Sandstone (Sherwood Sandstone) groundwater in the north Warwickshire supply zone, treated at Frankley Water Treatment Works in south Birmingham. At 148 mg/L (10.4°Clark), Hartshill's water is moderately hard — reflecting a moderate Triassic Sandstone groundwater blend fraction in the north Warwickshire distribution sub-zone.

Hartshill lies in the north Warwickshire supply zone where Severn Trent Water blends the soft Elan Valley Welsh upland aqueduct supply with a proportion of Permo-Triassic Sherwood Sandstone groundwater from the Warwickshire–Staffordshire lowland aquifer. The Triassic contribution elevates hardness to 148 mg/L with TDS 354.1 mg/L — moderately hard, consistent with the north Warwickshire and south Staffordshire Triassic groundwater transition zone that serves communities from Nuneaton through Hartshill to the south Staffordshire fringe.

At 148 mg/L, limescale is a noticeable household concern in Hartshill. Kettles benefit from descaling every four to six weeks. The combi-boiler should be fitted with a scale inhibitor and serviced annually. Washing-up liquid requires slightly more product than in softer areas. Taps and shower heads develop moderate limescale deposits within two to three weeks; a monthly wipe with white vinegar keeps fixtures in good condition. The moderately hard supply at Hartshill reflects the transition between the soft Welsh Elan Valley aqueduct baseline and the harder Triassic Sandstone groundwater contributions that increase progressively east and south across the north Warwickshire distribution zone.