Washwood Heath Water Hardness & Quality Report (2026)

Washwood Heath, in the City of Birmingham in east Birmingham near Saltley and Castle Bromwich, is supplied by Severn Trent Water from the Elan Valley Aqueduct blended with Triassic Sherwood Sandstone groundwater from the east Birmingham Triassic aquifer. The Elan Valley supply delivers very soft water from mid-Wales, but Washwood Heath's east Birmingham position draws a significantly higher proportion of Triassic sandstone groundwater than west Birmingham and west Midlands zones. The Triassic Sherwood Sandstone beneath east Birmingham and the Tame valley contributes elevated dissolved calcium and sulphate, pushing the supply hardness to a moderately hard level considerably above the soft west Birmingham Elan Valley zones. The TDS of 506.6 mg/L reflects the elevated mineral content of the east Birmingham supply zone.

Washwood Heath's moderately hard water — 189.5 mg/L (13.3°Clark) — reflects the higher Triassic Sandstone groundwater contribution in the east Birmingham Severn Trent supply zone, distinctly harder than west Birmingham zones supplied more directly from the Elan Valley. The Drinking Water Inspectorate (DWI) classifies this supply as moderately hard.

Limescale is a regular household concern in Washwood Heath. At 189.5 mg/L, limescale forms in kettles within three to four weeks and monthly descaling is sensible. Combi-boiler heat exchangers accumulate deposits at a moderate rate; annual servicing is recommended. Showerheads and taps develop consistent deposits. Washing-up liquid lathers moderately. Using Calgon monthly in the washing machine and a regular descaling routine is appropriate limescale management for Washwood Heath households.