WG
WaterGrade

Water Hardness in South Hampstead

South Hampstead has hard water at 259 mg/l CaCO₃. This is above the UK national average of 197.72 mg/l. You may notice limescale buildup on taps, in kettles, and around showerheads.

259

mg/l CaCO₃

HardUK average: 197.72 mg/l
259
0 (Soft)200 (Hard)400+ (Very Hard)

What Does Hard Water Mean?

With a hardness of 259 mg/l, South Hampstead has hard water. This level of hardness is common in areas supplied from chalk and limestone aquifers in the South East of England.

You will likely notice white limescale deposits on taps, showerheads, and inside your kettle. Over time, limescale can reduce the efficiency of boilers and heating systems, increasing energy costs. A water softener can help prevent these issues.

Water Supplier

Water Company
Thames Water
Supply Zone
St Johns Wood & Mayfair (NLW44)
Source Type
River
Treatment Works
St Johns Wood & Mayfair Treatment Works

Full Water Quality Report for South Hampstead

See all 8 water quality parameters including pH, chlorine, lead, nitrate, fluoride and more.

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Frequently Asked Questions

Is water hard in South Hampstead?▾
Yes, South Hampstead has hard water at 259 mg/l CaCO₃, classified as "Hard". You will likely notice limescale buildup on taps, in kettles, and around showerheads. A water softener or regular descaling can help manage this.
What is the hardness of water in South Hampstead?▾
The water hardness in South Hampstead is 259 mg/l CaCO₃ (milligrams per litre of calcium carbonate). This is classified as "Hard" on the standard UK scale and is above the national average of 197.72 mg/l. Water is supplied by Thames Water from river sources.
Who supplies water to South Hampstead?▾
Water in South Hampstead is supplied by Thames Water, which covers the London and Thames Valley region. The water is sourced from river abstraction and treated at St Johns Wood & Mayfair Treatment Works before distribution.
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