WaterHard.uk

Water Hardness in SO16 Southampton

Supplied by Severn Trent Water • Hampshire, South East

188 PPM 0 200 400
Hard
188
ppm (mg/L CaCO₃)
13.2°
Clark Degrees
10.5°
German Degrees (dH)
18.8°
French Degrees (fH)

Water Hardness in Southampton (SO16)

The water in postcode district SO16 is classified as hard with a hardness level of 188 ppm (parts per million) calcium carbonate. This is 19 ppm below the UK national average of 207 ppm.

Your water is supplied by Severn Trent Water, which serves the South East region. Severn Trent 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 Southampton

At 188 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.

View on Amazon

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.

View on Amazon

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.

View on Amazon

How SO16 Compares

Area Hardness PPM
SO16 Southampton
188 ppm
188 ppm
UK National Average
207 ppm
207 ppm

Nearby Areas

SO15
Southampton
187 ppm
SO17
Southampton
189 ppm
SO18
Southampton
190 ppm

Frequently Asked Questions

What is the water hardness in SO16 Southampton?
The water in SO16 Southampton has a hardness level of 188 ppm (parts per million) calcium carbonate, classified as hard. This is 19 ppm below the UK national average of 207 ppm.
Which water company supplies SO16?
SO16 Southampton is supplied by Severn Trent Water. Severn Trent Water serves the South East region.
Is the water in SO16 safe to drink?
Yes. Hard water at 188 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 SO16?
For hard water at 188 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 188 ppm water hardness mean?
188 ppm means there are 188 parts per million of calcium carbonate dissolved in the water. This is equivalent to 13.2 Clark degrees, 10.5 German degrees, or 18.8 French degrees. Water above 180 ppm is generally considered hard.

Learn More

All postcodes in Southampton Severn Trent Water coverage Hard water effects on your home Solutions for hard water

Get updates for SO16

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