Yeadon Water Hardness & Quality Report (2026)

Yeadon, in the City and Borough of Leeds in north-west Leeds adjacent to Leeds Bradford Airport on the Aireborough plain, is supplied by Yorkshire Water from the Washburn Valley Reservoirs — Fewston, Swinsty, and Thruscross — and the River Nidd and Wharfe catchments. The Washburn reservoirs impound moorland streams from Carboniferous Millstone Grit of the mid-Wharfedale valley. The River Nidd drains the Great Scar Limestone of the Yorkshire Dales north of Grassington and the limestone country of Nidderdale, contributing moderate dissolved calcium. Yorkshire Water blends the soft Washburn upland reservoir supply with the harder Nidd and Wharfe catchment contributions, distributing through the north-west Leeds supply network to Yeadon. The result is a moderately hard supply typical of the north Leeds Aireborough zone.

Yeadon's hardness of 185.5 mg/L (13.0°Clark) reflects the blend of soft Washburn upland reservoir supply and moderate Nidd/Wharfe Yorkshire Dales limestone contributions in Yorkshire Water's north-west Leeds distribution zone. The Drinking Water Inspectorate (DWI) classifies this supply as moderately hard.

Limescale is a regular household concern in Yeadon. At 185.5 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 Yeadon households.