Water hardness

SA9 Swansea

Near or below the UK average. Limescale builds slowly.

At 66 ppm, Swansea ranks near the UK's softest water areas — compare it against the hardest areas.

Slightly Hard 66 ppm Wales Welsh Water (Dwr Cymru)
Your reading
66
parts per million
Soft
Moderate
Hard
Very hard
0100200300400+

What this means for your home

Based on 66 ppm in Swansea (slightly hard water).

  • Minor limescale may appear in kettles over time
  • Soap lathers reasonably well
  • Appliances generally unaffected
  • Good balance of mineral taste
Heat loss
1%
Minimal scaling
Softener salt
£4–6
per year
Worth it?
No
at 66 ppm
Suggested for slightly hard water
Filter jug (optional)
Mainly a taste preference, limescale won't be a real issue here.
From £20
Maintenance habits
Routine descaling once or twice a year is plenty.
Free
Softening

Should you soften the water in Swansea?

A verdict and running-cost estimate based on SA9's 66 ppm reading, for a typical 4-person household.

Softener optional

Water is soft to moderate, so limescale and soap costs are low and a softener rarely pays back.

Recommended size
24k
grain capacity, regenerates ~every 40.6 days
Salt running cost
£4–6
per year (~13 kg salt)
Limescale
1%
est. heater efficiency loss. Minimal scaling
Soap saving
Minimal
Water is already soft, so there is little detergent saving from softening.

Appliance impact at 66 ppm: negligible: appliances reach full expected life. Sized for a 4-person home; regenerates roughly every 41 days (estimate). Figures are conservative estimates and vary with household size and usage.

Water quality details

Hardness data for SA9

Sourced from Welsh Water (Dwr Cymru)'s published water-quality reports and public records.

Hardness measurements

Parts per million (ppm CaCO₃)66
Degrees Clark (°Clark)4.6
Degrees French (°fH)6.6
Degrees German (°dH)3.7
Calcium (mg/L Ca²⁺)26

Supplier and area

Water supplier Welsh Water (Dwr Cymru)
Region Wales
County West Wales
Hardness band Slightly Hard
UK average 207 ppm
Visit Welsh Water (Dwr Cymru) page
Official source
Dwr Cymru Welsh Water water-hardness report

Read the hardness explanation here, then enter your postcode on the linked drinking water quality checker to see your area's calcium and magnesium levels.

Nearby

Other areas near Swansea

SA8
Swansea
65ppm
Slightly Hard
SA10
Neath
42ppm
Soft
SA11
Neath
43ppm
Soft
FAQ

Common questions about SA9

What is the water hardness in SA9 Swansea?
The water in SA9 Swansea has a hardness level of 66 ppm (parts per million) calcium carbonate, classified as slightly hard. This is 141 ppm below the UK national average of 207 ppm.
Which water company supplies SA9?
SA9 Swansea is supplied by Welsh Water (Dwr Cymru). Welsh Water (Dwr Cymru) serves the Wales region.
Is the water in SA9 safe to drink?
Yes. Slightly Hard water at 66 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 SA9?
At 66 ppm, the water in SA9 is slightly hard and unlikely to cause significant issues. A jug filter can improve taste, but a water softener is generally not necessary.
What does 66 ppm water hardness mean?
66 ppm means there are 66 parts per million of calcium carbonate dissolved in the water. This is equivalent to 4.6 Clark degrees, 3.7 German degrees, or 6.6 French degrees. Water above 180 ppm is generally considered hard.
What size water softener do I need in SA9?
For a typical 4-person home at 66 ppm, a 24,000 grain softener is a sensible size. It would regenerate roughly every 40.6 days. Larger households or higher daily use need a bigger unit. These figures are conservative estimates.
How much does it cost to run a water softener in SA9?
At 66 ppm, expect to use about 13 kg of salt a year, costing roughly £4–£6/year. Water is soft to moderate, so limescale and soap costs are low and a softener rarely pays back.

Your Swansea water action plan

Enter your email for the short list of things worth doing at 66 ppm, and the upgrades you can safely ignore.

Check another postcode

Compare hardness across areas before moving or buying a softener.