Oldbury Water Hardness & Quality Report (2026)

South Staffs Water supplies Oldbury, the south Staffordshire and Sandwell town in the Black Country — an iconic Black Country community at the heart of the West Midlands industrial conurbation, historically one of England's most intensively industrialised areas, home of the Chances Glass works (the world's first large-scale plate glass manufacturer), and now part of the Sandwell regeneration corridor along the Tame Valley — from the Elan Valley Aqueduct (Birmingham Corporation Waterworks, Powys upland reservoir supply) blended with Permo-Triassic Sherwood Sandstone groundwater in the Sandwell–Oldbury distribution zone, treated at Kinver Water Treatment Works near Stourbridge. At 210 mg/L (14.7°Clark), Oldbury's water is hard — reflecting a significant Triassic Sandstone and Coal Measures groundwater fraction in the South Staffs Water Sandwell supply blend.

Oldbury sits at the heart of the Black Country on the South Staffordshire Coalfield where South Staffs Water blends soft Elan Valley Welsh reservoir supply with Permo-Triassic Sherwood Sandstone and Carboniferous Coal Measures groundwater from the Sandwell plain. The Coal Measures and Triassic fraction elevates hardness to 210 mg/L with TDS 592.6 mg/L — hard water with an elevated TDS/hardness ratio (2.82) consistent with sulphate contributions from the Coal Measures mudstone and Triassic Keuper Marl beds in the Black Country Sandwell distribution zone.

At 210 mg/L, limescale is a persistent household challenge in Oldbury. Kettles should be descaled monthly. The combi-boiler benefits from a fitted scale inhibitor and annual professional servicing. 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 Black Country supply at Oldbury is a product of the Triassic and Coal Measures geology beneath the conurbation — the same strata that once yielded coal now contributing sulphate to the tap water of this busy Sandwell community.