Water hardness

WN7 Leigh

Near or below the UK average. Limescale builds slowly.

At 118 ppm, Leigh ranks near the UK's softest water areas — compare it against the hardest areas.

Slightly Hard 118 ppm North West United Utilities
Your reading
118
parts per million
Soft
Moderate
Hard
Very hard
0100200300400+

What this means for your home

Based on 118 ppm in Leigh (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
4%
Light scaling
Softener salt
£7–12
per year
Worth it?
No
at 118 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 Leigh?

A verdict and running-cost estimate based on WN7's 118 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 22.7 days
Salt running cost
£7–12
per year (~24 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 118 ppm: slight: minor descaling extends kettle/boiler life. Sized for a 4-person home; regenerates roughly every 23 days (estimate). Figures are conservative estimates and vary with household size and usage.

Test Your Water in Leigh

At 118 ppm, your water is slightly hard. A home testing kit lets you verify the exact hardness and check for other contaminants.

TESPERT 16-in-1 Water Testing Kit

From ~£10

Home water test strips that check hardness, pH, chlorine, lead, and 12 other parameters. Results in around 60 seconds. 125 strips per pack.

View on Amazon
Water quality details

Hardness data for WN7

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

Hardness measurements

Parts per million (ppm CaCO₃)118
Degrees Clark (°Clark)8.3
Degrees French (°fH)11.8
Degrees German (°dH)6.6
Calcium (mg/L Ca²⁺)47

Supplier and area

Water supplier United Utilities
Region North West
County Greater Manchester
Hardness band Slightly 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 Leigh

WN6
Wigan
117ppm
Slightly Hard
WN8
Skelmersdale
119ppm
Slightly Hard
FAQ

Common questions about WN7

What is the water hardness in WN7 Leigh?
The water in WN7 Leigh has a hardness level of 118 ppm (parts per million) calcium carbonate, classified as slightly hard. This is 89 ppm below the UK national average of 207 ppm.
Which water company supplies WN7?
WN7 Leigh is supplied by United Utilities. United Utilities serves the North West region.
Is the water in WN7 safe to drink?
Yes. Slightly Hard water at 118 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 WN7?
At 118 ppm, the water in WN7 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 118 ppm water hardness mean?
118 ppm means there are 118 parts per million of calcium carbonate dissolved in the water. This is equivalent to 8.3 Clark degrees, 6.6 German degrees, or 11.8 French degrees. Water above 180 ppm is generally considered hard.
What size water softener do I need in WN7?
For a typical 4-person home at 118 ppm, a 24,000 grain softener is a sensible size. It would regenerate roughly every 22.7 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 WN7?
At 118 ppm, expect to use about 24 kg of salt a year, costing roughly £7–£12/year. Water is soft to moderate, so limescale and soap costs are low and a softener rarely pays back.

Get WN7 Water Updates

We'll notify you when United Utilities reports changes to water hardness in your area.

Check another postcode

Compare hardness across areas before moving or buying a softener.