Water hardness

DH4 Houghton Le Spring

Near or below the UK average. Limescale builds slowly.

At 147 ppm, Houghton Le Spring ranks near the UK's softest water areas — compare it against the hardest areas.

Moderately Hard 147 ppm North East Northumbrian Water
Your reading
147
parts per million
Soft
Moderate
Hard
Very hard
0100200300400+

What this means for your home

Based on 147 ppm in Houghton Le Spring (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 147 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 Houghton Le Spring?

A verdict and running-cost estimate based on DH4's 147 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 18.2 days
Salt running cost
£8–14
per year (~30 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 147 ppm: slight: minor descaling extends kettle/boiler life. Sized for a 4-person home; regenerates roughly every 18 days (estimate). Figures are conservative estimates and vary with household size and usage.

Test Your Water in Houghton Le Spring

At 147 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 DH4

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

Hardness measurements

Parts per million (ppm CaCO₃)147
Degrees Clark (°Clark)10.3
Degrees French (°fH)14.7
Degrees German (°dH)8.2
Calcium (mg/L Ca²⁺)59

Supplier and area

Water supplier Northumbrian Water
Region North East
County County Durham
Hardness band Moderately 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 Houghton Le Spring

DH3
Chester Le Street
146ppm
Moderately Hard
DH5
Houghton Le Spring
148ppm
Moderately Hard
DH6
Durham
149ppm
Moderately Hard
FAQ

Common questions about DH4

What is the water hardness in DH4 Houghton Le Spring?
The water in DH4 Houghton Le Spring has a hardness level of 147 ppm (parts per million) calcium carbonate, classified as moderately hard. This is 60 ppm below the UK national average of 207 ppm.
Which water company supplies DH4?
DH4 Houghton Le Spring is supplied by Northumbrian Water. Northumbrian Water serves the North East region.
Is the water in DH4 safe to drink?
Yes. Moderately Hard water at 147 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 DH4?
At 147 ppm, the water in DH4 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 147 ppm water hardness mean?
147 ppm means there are 147 parts per million of calcium carbonate dissolved in the water. This is equivalent to 10.3 Clark degrees, 8.2 German degrees, or 14.7 French degrees. Water above 180 ppm is generally considered hard.
What size water softener do I need in DH4?
For a typical 4-person home at 147 ppm, a 24,000 grain softener is a sensible size. It would regenerate roughly every 18.2 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 DH4?
At 147 ppm, expect to use about 30 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.

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