Cramlington Water Hardness & Quality Report (2026)

Cramlington, the south Northumberland new town developed from the 1960s near Blyth, is supplied by Northumbrian Water from the Kielder Transfer Scheme and the River Blyth catchment of south-east Northumberland. Kielder Reservoir provides the dominant soft upland supply via the North Tyne aqueduct, and the River Blyth catchment on the Carboniferous coal measure country of south Northumberland adds only a modest calcium increment. Cramlington's new town position between Newcastle and Blyth is in the Northumbrian Water south Northumberland distribution zone, where the supply is predominantly Kielder-soft with limited groundwater blending. The supply hardness closely resembles Blyth (115.5 mg/L) but is softer, likely reflecting a higher Kielder proportion in the Cramlington distribution zone.

Cramlington's soft water — 78 mg/L (5.5°Clark) — reflects the predominantly soft Kielder Reservoir supply in Northumbrian Water's south Northumberland new town distribution zone. The Drinking Water Inspectorate (DWI) classifies this supply as soft.

Limescale is very minor in Cramlington. At 78 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 well with the soft Kielder supply. Limescale is not a significant domestic concern for Cramlington households on the Northumbrian Water supply.