Streetly Water Hardness & Quality Report (2026)

South Staffordshire Water supplies Streetly, an affluent residential suburb straddling the Walsall–Sutton Coldfield border in the Metropolitan Borough of Walsall — a community of mid-twentieth-century housing set among the parkland of Sutton Park National Nature Reserve at the south Staffordshire plateau fringe — from the Elan Valley Welsh aqueduct blended with local Permo-Triassic Sandstone (Sherwood Sandstone) groundwater, treated at Blithbury Water Treatment Works near Rugeley. At 113.5 mg/L (8.0°Clark), Streetly's water is slightly hard — considerably softer than nearby Brownhills (239 mg/L), also in Walsall — reflecting a much higher proportion of soft Elan Valley Welsh aqueduct supply in the Streetly distribution sub-zone.

Streetly lies near the Sutton Park watershed plateau, in the South Staffordshire Water supply zone where the soft Elan Valley aqueduct supply dominates over the local Triassic groundwater contribution. The contrast between Streetly (113.5 mg/L, TDS 257.5 mg/L) and Brownhills (239 mg/L, TDS 715.4 mg/L) — both in the same Walsall borough — strikingly illustrates how different distribution sub-zone blend ratios create dramatically different water quality within a very small geographical area in south Staffordshire.

At 113.5 mg/L, limescale is a moderate and manageable domestic concern in Streetly. Descaling the kettle every six to eight weeks is typically adequate. The combi-boiler benefits from a standard scale inhibitor as a precaution. Washing-up liquid lathers adequately at everyday quantities. Taps and shower heads develop light deposits over several weeks; a monthly wipe with white vinegar keeps fixtures in good condition. The relatively soft supply at Streetly reflects the strong Elan Valley aqueduct influence in this part of the South Staffordshire Water distribution network, close to the Sutton Park watershed.