Barkingside Water Hardness & Quality Report (2026)

Thames Water supplies Barkingside, a north-east London suburb in the London Borough of Redbridge — home of Barnardo's original village homes at Barkingside Village (now a film studio) and a community of interwar and postwar residential estates along the Hainault corridor — from the River Lee chalk-catchment blend in the east London distribution zone, treated at Lee Valley Water Treatment Works complex. At 277 mg/L (19.4°Clark), Barkingside's water is very hard — consistent with the Lee Valley chalk-tributary dominant supply that characterises the Thames Water east London and Redbridge distribution zone.

Barkingside lies in the Thames Water east London distribution zone where supply from the Lee Valley chain of reservoirs (fed by the chalk-tributary River Lee carrying Hertfordshire Chalk groundwater) is distributed through the Redbridge and east London boroughs. The Lee Valley chalk tributary supply produces 277 mg/L with TDS 742.5 mg/L at Barkingside — very hard water consistent with the east London distribution zone that includes Goodmayes (279.5 mg/L), Ilford, and Barking, all receiving the same hard chalk-influenced Lee Valley supply.

At 277 mg/L, limescale is a persistent and significant household problem in Barkingside. Kettles should be descaled every two to three weeks. The combi-boiler needs a fitted scale inhibitor and annual professional servicing. Washing-up liquid requires generous quantities for adequate lather. Taps and shower heads develop substantial white chalk deposits within a week to ten days; a fortnightly descaling with white vinegar or a proprietary product keeps fittings in good condition. The very hard east London supply is an unavoidable reality of domestic life for Barkingside residents in this chalk-supply dominated Redbridge community.