Biddulph Water Hardness & Quality Report (2026)

Severn Trent Water supplies Biddulph, a moorland town in north Staffordshire on the southern edge of the Pennines between the Potteries and Macclesfield. Supply is drawn from Tittesworth Reservoir on Meerbrook Beck at the edge of the Peak District, supplemented by Carboniferous Limestone groundwater from the nearby Manifold and Dove valleys, treated at Tittesworth works before distribution across north Staffordshire. At 142.5 mg/L (10.0°Clark), Biddulph's water is moderately soft, reflecting the dilution of harder limestone groundwater by the softer upland reservoir supply from the Peak District edge.

Tittesworth Reservoir is fed by moorland streams from the Roaches and Gritstone uplands of the south-west Peak District, producing naturally soft water from the Millstone Grit and Carboniferous sandstone catchments. However, the Severn Trent distribution network for north Staffordshire blends this upland source with groundwater from the Carboniferous Limestone valleys of the White Peak — the Manifold and Dove river catchments — which yield calcium-rich water through extensive limestone dissolution. The resulting blend delivers the moderately soft supply characteristic of this transitional geological boundary zone.

At 142.5 mg/L, Biddulph's water is moderately soft with manageable limescale demands. Descaling the kettle every six to eight weeks is typically adequate. The combi-boiler benefits from a fitted scale inhibitor as a standard precaution. Washing-up liquid lathers satisfactorily at everyday quantities. Taps and shower heads develop light limescale deposits over a few weeks; a monthly wipe with white vinegar or a mild descaling product keeps fittings in good condition. The moderately soft supply reflects Biddulph's geographical position at the junction of the gritstone Pennines and the limestone Peak District.