Wednesfield Water Hardness & Quality Report (2026)

Wednesfield, in the City of Wolverhampton north-east of the city centre in the northern Black Country, is supplied by Severn Trent Water from the Elan Valley Aqueduct and the Triassic Sherwood Sandstone aquifer. The Elan Valley Aqueduct delivers very soft water from the mid-Wales Silurian/Ordovician upland reservoirs, and Severn Trent blends this with Triassic sandstone groundwater from licensed boreholes in the Wolverhampton/Black Country Triassic plain. Wednesfield's north Wolverhampton position is in a supply zone with a moderate Triassic sandstone groundwater increment — harder than purer Elan Valley west Black Country zones but softer than the east Black Country Triassic-dominant areas like Tipton (202.5 mg/L). The supply hardness is consistent with the north Wolverhampton Severn Trent distribution zone.

Wednesfield's hardness of 136 mg/L (9.5°Clark) reflects the predominantly soft Elan Valley supply with moderate Triassic sandstone groundwater blending in the Severn Trent north Wolverhampton supply zone. The Drinking Water Inspectorate (DWI) classifies this supply as moderately soft.

Limescale is a moderate concern in Wednesfield. At 136 mg/L, limescale forms gradually in kettles and descaling every one to two months is typically sufficient. Combi-boiler heat exchangers accumulate modest deposits; annual servicing is sensible. Showerheads and taps develop light deposits. Washing-up liquid lathers reasonably well. A monthly Calgon tablet in the washing machine and a regular kettle descale is adequate limescale management for most Wednesfield households.