Queen's Park Water Hardness & Quality Report (2026)

Thames Water supplies Queen's Park, a leafy inner north-west London suburb in the London Borough of Brent — a community of Victorian and Edwardian terraces around the Victorian pleasure gardens of Queen's Park, close to Kensal Green Cemetery and the Harrow Road corridor — from the River Thames at Hampton blended with River Lee chalk-catchment supply in the north-west London distribution zone, treated at Hampton Water Treatment Works. At 274.5 mg/L (19.3°Clark), Queen's Park's water is very hard — consistent with the Thames Water north-west London inner city distribution character supplied from the chalk-influenced Thames and Lee supply blend.

Queen's Park lies in the Thames Water north-west London inner distribution zone where supply from Hampton treatment works (River Thames, chalk-tributary influenced) is distributed through the Brent and north-west London supply network alongside Lee Valley chalk contributions. The chalk-tributary Thames carries moderate calcium loading from the Chiltern, Berkshire Downs, and North Downs upland catchments, delivering 274.5 mg/L with TDS 743.2 mg/L for the Queen's Park supply zone — very hard water consistent with the Thames Water inner west and north-west London distribution character throughout Brent, Paddington, and the adjacent north London boroughs.

At 274.5 mg/L, limescale is a persistent and significant household problem in Queen's Park. 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 Thames Water supply is an unavoidable reality for all Queen's Park and north-west inner London households.