London Water Quality Data

Hardness300 mg/L CaCO3 — very hard
SourceThames and River Lee reservoirs, chalk aquifers (Thames Water)
ChlorineModerate to high — surface water treatment (up to 0.5 mg/L)
Calcium100-130 mg/L
Magnesium5-15 mg/L
CountryUnited Kingdom

How London Water Affects Your Skin & Hair

At 300 mg/L CaCO3, London water has measurable effects on your skin and hair health:

  • Severe limescale buildup on shower screens and taps within days
  • Dry, tight skin — a near-universal complaint among Londoners
  • Dull, brittle hair; colour-treated hair fades 2–3 weeks faster
  • Eczema and dermatitis flare-ups linked to hard water (Sheffield Uni study)

These effects are particularly severe and accumulate with every daily shower.

Did you know? London has some of the hardest water in Europe. An activated carbon filter is essential for anyone with sensitive skin, eczema, or colour-treated hair.

Areas Covered

The data above applies to Central London, Hackney, Camden, Islington, Brixton, Croydon, Richmond, and all Thames Water areas.

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FAQ — Water & Showering in London

Is London water hard?

Yes — 300 mg/L CaCO3 (very hard). Source: Thames and River Lee reservoirs, chalk aquifers (Thames Water). Calcium reaches 100-130 mg/L.

How to protect skin and hair in London?

An activated carbon filtered shower head like the Limpéa removes 97% of chlorine and reduces limescale. It's the most direct and effective solution — installs in 20 seconds, results from day one.

Does the Limpéa work with London water?

Yes. The Limpéa is designed for all hardness levels, including London's very hard water. Universal G1/2" fitting, compatible with 99% of standard showers worldwide.