Newburn Water Hardness & Quality Report (2026)

Newburn, in the Metropolitan Borough of Newcastle upon Tyne on the south bank of the Tyne valley west of the city, is supplied by Northumbrian Water from the Kielder Transfer Scheme via the North Tyne aqueduct and river corridor. Kielder Reservoir — Europe's largest man-made lake by capacity — impounds the North Tyne on ancient Silurian greywacke and Carboniferous moorland of north Northumberland, producing exceptionally soft upland water. Newburn's position on the west Tyneside distribution network, upstream of the main population centres, means the supply receives a higher proportion of the pure soft Kielder water before downstream blending with catchment contributions raises hardness levels. This gives Newburn a notably softer supply than the east Tyneside zones such as Wallsend (125 mg/L).

Newburn's soft water — 68 mg/L (4.8°Clark) — reflects the very soft Kielder Reservoir supply dominant in the west Tyneside distribution zone. The Drinking Water Inspectorate (DWI) classifies this supply as soft.

Limescale is very minor in Newburn. At 68 mg/L, limescale builds slowly — kettles need descaling every two to three months. Combi-boiler heat exchangers accumulate minimal deposits; annual servicing is routine. Showerheads and taps remain largely clear. Washing-up liquid lathers very well with the soft Kielder supply. Limescale is not a significant domestic concern for Newburn households on the west Tyneside Northumbrian Water supply.