Water hardness

SK9 Wilmslow

Near or below the UK average. Limescale builds slowly.

At 142 ppm, Wilmslow ranks near the UK's softest water areas — compare it against the hardest areas.

Moderately Hard 142 ppm North West United Utilities
Your reading
142
parts per million
Soft
Moderate
Hard
Very hard
0100200300400+

What this means for your home

Based on 142 ppm in Wilmslow (moderately hard water).

  • Noticeable limescale buildup in kettles and boilers
  • Soap may not lather as easily
  • Showerhead may need descaling periodically
  • Slight film on glassware after washing
Heat loss
4%
Light scaling
Softener salt
£8–14
per year
Worth it?
No
at 142 ppm
Suggested for moderately 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 Wilmslow?

A verdict and running-cost estimate based on SK9's 142 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 18.9 days
Salt running cost
£8–14
per year (~29 kg salt)
Limescale
4%
est. heater efficiency loss. Light scaling
Soap saving
Low
Some saving: expect to use slightly less soap and detergent.

Appliance impact at 142 ppm: slight: minor descaling extends kettle/boiler life. Sized for a 4-person home; regenerates roughly every 19 days (estimate). Figures are conservative estimates and vary with household size and usage.

Water quality details

Hardness data for SK9

Sourced from United Utilities's published water-quality reports and public records.

Hardness measurements

Parts per million (ppm CaCO₃)142
Degrees Clark (°Clark)9.9
Degrees French (°fH)14.2
Degrees German (°dH)8
Calcium (mg/L Ca²⁺)57

Supplier and area

Water supplier United Utilities
Region North West
County Cheshire
Hardness band Moderately Hard
UK average 207 ppm
Visit United Utilities page
Official source
United Utilities Water Ltd water-hardness report

Read the hardness explainer (most North West water is soft or very soft) and download the factsheet for conversion tables.

Nearby

Other areas near Wilmslow

SK8
Cheadle
141ppm
Moderately Hard
SK10
Macclesfield
63ppm
Slightly Hard
SK11
Macclesfield
64ppm
Slightly Hard
FAQ

Common questions about SK9

What is the water hardness in SK9 Wilmslow?
The water in SK9 Wilmslow has a hardness level of 142 ppm (parts per million) calcium carbonate, classified as moderately hard. This is 65 ppm below the UK national average of 207 ppm.
Which water company supplies SK9?
SK9 Wilmslow is supplied by United Utilities. United Utilities serves the North West region.
Is the water in SK9 safe to drink?
Yes. Moderately Hard water at 142 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 SK9?
At 142 ppm, the water in SK9 is moderately hard and unlikely to cause significant issues. A jug filter can improve taste, but a water softener is generally not necessary.
What does 142 ppm water hardness mean?
142 ppm means there are 142 parts per million of calcium carbonate dissolved in the water. This is equivalent to 9.9 Clark degrees, 8 German degrees, or 14.2 French degrees. Water above 180 ppm is generally considered hard.
What size water softener do I need in SK9?
For a typical 4-person home at 142 ppm, a 24,000 grain softener is a sensible size. It would regenerate roughly every 18.9 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 SK9?
At 142 ppm, expect to use about 29 kg of salt a year, costing roughly £8–£14/year. Water is soft to moderate, so limescale and soap costs are low and a softener rarely pays back.

Your Wilmslow water action plan

Enter your email for the short list of things worth doing at 142 ppm, and the upgrades you can safely ignore.

Check another postcode

Compare hardness across areas before moving or buying a softener.