Wallsend Water Hardness & Quality Report (2026)

Wallsend, in the Metropolitan Borough of North Tyneside on the north bank of the Tyne — historically marking the eastern terminus of Hadrian's Wall — is supplied by Northumbrian Water from the Kielder Transfer Scheme and the River Tyne catchment. Kielder Reservoir is Europe's largest man-made lake by capacity, impounding the North Tyne on the Silurian greywacke and Carboniferous moorland of north Northumberland — catchment geology that produces very soft, peat-coloured upland water. The North Tyne from Kielder flows through Northumberland to join the South Tyne at Hexham, and Northumbrian Water distributes through the Tyne valley network to North Tyneside. The Tyneside supply is a blend of very soft Kielder water with moderate Tyne valley catchment contributions, producing a moderately soft supply across Tyneside.

Wallsend's hardness of 125 mg/L (8.8°Clark) reflects the blend of very soft Kielder Transfer supply and moderate Tyne valley catchment contributions in the North Tyneside Northumbrian Water distribution zone. The Drinking Water Inspectorate (DWI) classifies this supply as moderately soft.

Limescale is a moderate concern in Wallsend. At 125 mg/L, limescale forms gradually — kettles need descaling every one to two months. 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 Wallsend households.