Water hardness

SN15 Chippenham

Near or below the UK average. Limescale builds slowly.

At 155 ppm, Chippenham ranks near the UK's softest water areas — compare it against the hardest areas.

Moderately Hard 155 ppm South West Wessex Water
Your reading
155
parts per million
Soft
Moderate
Hard
Very hard
0100200300400+

What this means for your home

Based on 155 ppm in Chippenham (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
£9–15
per year
Worth it?
No
at 155 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 Chippenham?

A verdict and running-cost estimate based on SN15's 155 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 17.3 days
Salt running cost
£9–15
per year (~32 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 155 ppm: slight: minor descaling extends kettle/boiler life. Sized for a 4-person home; regenerates roughly every 17 days (estimate). Figures are conservative estimates and vary with household size and usage.

Test Your Water in Chippenham

At 155 ppm, your water is moderately 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 SN15

Sourced from Wessex Water's published water-quality reports and public records.

Hardness measurements

Parts per million (ppm CaCO₃)155
Degrees Clark (°Clark)10.8
Degrees French (°fH)15.5
Degrees German (°dH)8.7
Calcium (mg/L Ca²⁺)62

Supplier and area

Water supplier Wessex Water
Region South West
County Wiltshire
Hardness band Moderately Hard
UK average 207 ppm
Visit Wessex Water page
Official source
Wessex Water water-hardness report

Read the hardness and limescale guidance here, then use the postcode checker to see your local hardness value.

Nearby

Other areas near Chippenham

SN14
Chippenham
154ppm
Moderately Hard
SN16
Malmesbury
156ppm
Moderately Hard
FAQ

Common questions about SN15

What is the water hardness in SN15 Chippenham?
The water in SN15 Chippenham has a hardness level of 155 ppm (parts per million) calcium carbonate, classified as moderately hard. This is 52 ppm below the UK national average of 207 ppm.
Which water company supplies SN15?
SN15 Chippenham is supplied by Wessex Water. Wessex Water serves the South West region.
Is the water in SN15 safe to drink?
Yes. Moderately Hard water at 155 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 SN15?
At 155 ppm, the water in SN15 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 155 ppm water hardness mean?
155 ppm means there are 155 parts per million of calcium carbonate dissolved in the water. This is equivalent to 10.8 Clark degrees, 8.7 German degrees, or 15.5 French degrees. Water above 180 ppm is generally considered hard.
What size water softener do I need in SN15?
For a typical 4-person home at 155 ppm, a 24,000 grain softener is a sensible size. It would regenerate roughly every 17.3 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 SN15?
At 155 ppm, expect to use about 32 kg of salt a year, costing roughly £9–£15/year. Water is soft to moderate, so limescale and soap costs are low and a softener rarely pays back.

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