WaterHard.uk

Water Hardness in N21 London

Supplied by Thames Water • Greater London, London

0 200 400 307 ppm
Very Hard
307
ppm (mg/L CaCO₃)
21.5°
Clark Degrees
17.2°
German Degrees (dH)
30.7°
French Degrees (fH)

Water Hardness in London (N21)

The water in postcode district N21 is classified as very hard with a hardness level of 307 ppm (parts per million) calcium carbonate. This is 102 ppm above the UK national average of 205 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 Very Hard Water Mean for Your Home?

  • ! Heavy limescale requiring frequent descaling
  • ! Blocked showerheads and reduced water flow
  • ! Substantially higher energy bills from boiler scale
  • ! Dry, itchy skin and lifeless hair
  • ! White crusty deposits on taps and surfaces
  • ! Reduced lifespan of washing machines and dishwashers

Solutions for Hard Water in London

At 307 ppm, you may benefit from a water softener or filter to reduce limescale and improve water quality.

View Solutions Water Softener Guide

How N21 Compares

Area Hardness PPM
N21 London
307 ppm
307 ppm
UK National Average
205 ppm
205 ppm

Nearby Areas

N20
London
306 ppm
N22
London
308 ppm

Frequently Asked Questions

What is the water hardness in N21 London?
The water in N21 London has a hardness level of 307 ppm (parts per million) calcium carbonate, classified as very hard. This is 102 ppm above the UK national average of 205 ppm.
Which water company supplies N21?
N21 London is supplied by Thames Water. Thames Water serves the London region.
Is the water in N21 safe to drink?
Yes. Very Hard water at 307 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 N21?
For very hard water at 307 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 307 ppm water hardness mean?
307 ppm means there are 307 parts per million of calcium carbonate dissolved in the water. This is equivalent to 21.5 Clark degrees, 17.2 German degrees, or 30.7 French degrees. Water above 180 ppm is generally considered hard.

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