WaterHard.uk

Water Hardness in W11 London

Supplied by Thames Water • Greater London, London

278 PPM 0 200 400
Hard
278
ppm (mg/L CaCO₃)
19.5°
Clark Degrees
15.6°
German Degrees (dH)
27.8°
French Degrees (fH)

Water Hardness in London (W11)

The water in postcode district W11 is classified as hard with a hardness level of 278 ppm (parts per million) calcium carbonate. This is 71 ppm above the UK national average of 207 ppm.

Your water is supplied by Thames Water, which serves the London region. Thames Water draws water from sources that naturally contain dissolved minerals, primarily calcium and magnesium compounds.

What Does Hard Water Mean for Your Home?

  • ! Significant limescale buildup in kettles, pipes and boilers
  • ! Soap scum on shower screens and taps
  • ! Higher energy bills from scale in heating elements
  • ! Dry skin and dull hair after washing
  • ! White residue on dishes and glassware

Solutions for Hard Water in London

At 278 ppm, you may benefit from a water softener or filter to reduce limescale and improve water quality.

View Solutions Water Softener Guide

Water2Buy W2B200 Water Softener

From ~£400

Best-value whole-house ion-exchange softener for UK homes. Eliminates limescale from pipes, boilers, and appliances. Digital metered regeneration — low salt use. 7-year warranty, suits 1–4 people.

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Philips AWP1775 Shower Filter

From ~£30

Instant improvement for skin and hair. Reduces chlorine and limescale at the showerhead — no plumbing needed. KDF filtration, cartridge lasts ~6 months. A great first step in a hard water area.

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BRITA Marella Water Filter Jug

From ~£20

UK's best-selling filter jug. Reduces limescale, chlorine, and metals for better-tasting tap water. Quick first step alongside a softener.

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How W11 Compares

Area Hardness PPM
W11 London
278 ppm
278 ppm
UK National Average
207 ppm
207 ppm

Nearby Areas

W10
London
277 ppm
W12
London
279 ppm
W13
London
280 ppm

Frequently Asked Questions

What is the water hardness in W11 London?
The water in W11 London has a hardness level of 278 ppm (parts per million) calcium carbonate, classified as hard. This is 71 ppm above the UK national average of 207 ppm.
Which water company supplies W11?
W11 London is supplied by Thames Water. Thames Water serves the London region.
Is the water in W11 safe to drink?
Yes. Hard water at 278 ppm is safe to drink. Water hardness affects taste and can cause limescale, but it is not a health risk. In fact, hard water contains beneficial minerals like calcium and magnesium.
How can I reduce water hardness in W11?
For hard water at 278 ppm, a whole-house water softener is the most effective solution. You can also use a jug filter for drinking water, descaling products for appliances, and a shower filter for better skin and hair.
What does 278 ppm water hardness mean?
278 ppm means there are 278 parts per million of calcium carbonate dissolved in the water. This is equivalent to 19.5 Clark degrees, 15.6 German degrees, or 27.8 French degrees. Water above 180 ppm is generally considered hard.

Learn More

All postcodes in London Thames Water coverage Hard water effects on your home Solutions for hard water

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