Water hardness

DL12 Barnard Castle

Near or below the UK average. Limescale builds slowly.

At 117 ppm, Barnard Castle ranks near the UK's softest water areas — compare it against the hardest areas.

Slightly Hard 117 ppm North East Northumbrian Water
Your reading
117
parts per million
Soft
Moderate
Hard
Very hard
0100200300400+

What this means for your home

Based on 117 ppm in Barnard Castle (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
£7–11
per year
Worth it?
No
at 117 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 Barnard Castle?

A verdict and running-cost estimate based on DL12's 117 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 22.9 days
Salt running cost
£7–11
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 117 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.

Water quality details

Hardness data for DL12

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

Hardness measurements

Parts per million (ppm CaCO₃)117
Degrees Clark (°Clark)8.2
Degrees French (°fH)11.7
Degrees German (°dH)6.6
Calcium (mg/L Ca²⁺)47

Supplier and area

Water supplier Northumbrian Water
Region North East
County County Durham
Hardness band Slightly Hard
UK average 207 ppm
Visit Northumbrian Water page
Official source
Northumbrian Water water-hardness report

This page explains local hardness and links to a postcode water quality checker so you can find your supply zone's level.

Nearby

Other areas near Barnard Castle

DL11
Richmond
116ppm
Slightly Hard
DL13
Bishop Auckland
118ppm
Slightly Hard
DL14
Bishop Auckland
119ppm
Slightly Hard
FAQ

Common questions about DL12

What is the water hardness in DL12 Barnard Castle?
The water in DL12 Barnard Castle has a hardness level of 117 ppm (parts per million) calcium carbonate, classified as slightly hard. This is 90 ppm below the UK national average of 207 ppm.
Which water company supplies DL12?
DL12 Barnard Castle is supplied by Northumbrian Water. Northumbrian Water serves the North East region.
Is the water in DL12 safe to drink?
Yes. Slightly Hard water at 117 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 DL12?
At 117 ppm, the water in DL12 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 117 ppm water hardness mean?
117 ppm means there are 117 parts per million of calcium carbonate dissolved in the water. This is equivalent to 8.2 Clark degrees, 6.6 German degrees, or 11.7 French degrees. Water above 180 ppm is generally considered hard.
What size water softener do I need in DL12?
For a typical 4-person home at 117 ppm, a 24,000 grain softener is a sensible size. It would regenerate roughly every 22.9 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 DL12?
At 117 ppm, expect to use about 24 kg of salt a year, costing roughly £7–£11/year. Water is soft to moderate, so limescale and soap costs are low and a softener rarely pays back.

Your Barnard Castle water action plan

Enter your email for the short list of things worth doing at 117 ppm, and the upgrades you can safely ignore.

Check another postcode

Compare hardness across areas before moving or buying a softener.