WaterHard.uk

Water Hardness in GU4 Guildford

Supplied by Thames Water • Surrey, South East

0 200 400 306 ppm
Very Hard
306
ppm (mg/L CaCO₃)
21.4°
Clark Degrees
17.1°
German Degrees (dH)
30.6°
French Degrees (fH)

Water Hardness in Guildford (GU4)

The water in postcode district GU4 is classified as very hard with a hardness level of 306 ppm (parts per million) calcium carbonate. This is 101 ppm above the UK national average of 205 ppm.

Your water is supplied by Thames Water, which serves the South East 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 Guildford

At 306 ppm, you may benefit from a water softener or filter to reduce limescale and improve water quality.

View Solutions Water Softener Guide

How GU4 Compares

Area Hardness PPM
GU4 Guildford
306 ppm
306 ppm
UK National Average
205 ppm
205 ppm

Nearby Areas

GU3
Guildford
305 ppm
GU5
Guildford
307 ppm
GU6
Cranleigh
308 ppm

Frequently Asked Questions

What is the water hardness in GU4 Guildford?
The water in GU4 Guildford has a hardness level of 306 ppm (parts per million) calcium carbonate, classified as very hard. This is 101 ppm above the UK national average of 205 ppm.
Which water company supplies GU4?
GU4 Guildford is supplied by Thames Water. Thames Water serves the South East region.
Is the water in GU4 safe to drink?
Yes. Very Hard water at 306 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 GU4?
For very hard water at 306 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 306 ppm water hardness mean?
306 ppm means there are 306 parts per million of calcium carbonate dissolved in the water. This is equivalent to 21.4 Clark degrees, 17.1 German degrees, or 30.6 French degrees. Water above 180 ppm is generally considered hard.

All postcodes in Guildford • Thames Water coverage • Hardest water areas • Softest water areas

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