WaterHard.uk

Water Hardness in SL4 Windsor

Supplied by Thames Water • Berkshire, South East

0 200 400 250 ppm
Hard
250
ppm (mg/L CaCO₃)
17.5°
Clark Degrees
14°
German Degrees (dH)
25°
French Degrees (fH)

Water Hardness in Windsor (SL4)

The water in postcode district SL4 is classified as hard with a hardness level of 250 ppm (parts per million) calcium carbonate. This is 45 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 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 Windsor

At 250 ppm, you may benefit from a water softener or filter to reduce limescale and improve water quality.

View Solutions Water Softener Guide

How SL4 Compares

Area Hardness PPM
SL4 Windsor
250 ppm
250 ppm
UK National Average
205 ppm
205 ppm

Nearby Areas

SL3
Slough
350 ppm
SL5
Ascot
251 ppm
SL6
Maidenhead
252 ppm

Frequently Asked Questions

What is the water hardness in SL4 Windsor?
The water in SL4 Windsor has a hardness level of 250 ppm (parts per million) calcium carbonate, classified as hard. This is 45 ppm above the UK national average of 205 ppm.
Which water company supplies SL4?
SL4 Windsor is supplied by Thames Water. Thames Water serves the South East region.
Is the water in SL4 safe to drink?
Yes. Hard water at 250 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 SL4?
For hard water at 250 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 250 ppm water hardness mean?
250 ppm means there are 250 parts per million of calcium carbonate dissolved in the water. This is equivalent to 17.5 Clark degrees, 14 German degrees, or 25 French degrees. Water above 180 ppm is generally considered hard.

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

Get updates for SL4

We'll notify you when Thames Water reports changes to water hardness in your area.