WaterHard.uk

Water Hardness in SW4 London

Supplied by Thames Water • Greater London, London

0 200 400 310 ppm
Very Hard
310
ppm (mg/L CaCO₃)
21.7°
Clark Degrees
17.4°
German Degrees (dH)
31°
French Degrees (fH)

Water Hardness in London (SW4)

The water in postcode district SW4 is classified as very hard with a hardness level of 310 ppm (parts per million) calcium carbonate. This is 105 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 310 ppm, you may benefit from a water softener or filter to reduce limescale and improve water quality.

View Solutions Water Softener Guide

How SW4 Compares

Area Hardness PPM
SW4 London
310 ppm
310 ppm
UK National Average
205 ppm
205 ppm

Nearby Areas

SW3
London
309 ppm
SW5
London
311 ppm
SW6
London
312 ppm

Frequently Asked Questions

What is the water hardness in SW4 London?
The water in SW4 London has a hardness level of 310 ppm (parts per million) calcium carbonate, classified as very hard. This is 105 ppm above the UK national average of 205 ppm.
Which water company supplies SW4?
SW4 London is supplied by Thames Water. Thames Water serves the London region.
Is the water in SW4 safe to drink?
Yes. Very Hard water at 310 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 SW4?
For very hard water at 310 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 310 ppm water hardness mean?
310 ppm means there are 310 parts per million of calcium carbonate dissolved in the water. This is equivalent to 21.7 Clark degrees, 17.4 German degrees, or 31 French degrees. Water above 180 ppm is generally considered hard.

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