WaterHard.uk

Water Hardness in DH1 Durham

Supplied by Northumbrian Water • County Durham, North East

144 PPM 0 200 400
Moderately Hard
144
ppm (mg/L CaCO₃)
10.1°
Clark Degrees
8.1°
German Degrees (dH)
14.4°
French Degrees (fH)

Water Hardness in Durham (DH1)

The water in postcode district DH1 is classified as moderately hard with a hardness level of 144 ppm (parts per million) calcium carbonate. This is 63 ppm below the UK national average of 207 ppm.

Your water is supplied by Northumbrian Water, which serves the North East region. Northumbrian Water draws water from sources that naturally contain dissolved minerals, primarily calcium and magnesium compounds.

What Does Moderately Hard Water Mean for Your Home?

  • ~ Noticeable limescale buildup in kettles and boilers
  • ~ Soap may not lather as easily
  • ~ Showerhead may need descaling periodically
  • ~ Slight film on glassware after washing

Test Your Water in Durham

At 144 ppm, your water is moderately hard. A home testing kit lets you verify the exact hardness and check for other contaminants.

SJ WAVE 16-in-1 Water Testing Kit

From ~£10

Quick home water test strips — checks hardness, pH, chlorine, lead, and 12 other parameters. Results in 60 seconds. 100 strips per pack.

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How DH1 Compares

Area Hardness PPM
DH1 Durham
144 ppm
144 ppm
UK National Average
207 ppm
207 ppm

Nearby Areas

DH2
Chester Le Street
145 ppm
DH3
Chester Le Street
146 ppm

Frequently Asked Questions

What is the water hardness in DH1 Durham?
The water in DH1 Durham has a hardness level of 144 ppm (parts per million) calcium carbonate, classified as moderately hard. This is 63 ppm below the UK national average of 207 ppm.
Which water company supplies DH1?
DH1 Durham is supplied by Northumbrian Water. Northumbrian Water serves the North East region.
Is the water in DH1 safe to drink?
Yes. Moderately Hard water at 144 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 DH1?
At 144 ppm, the water in DH1 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 144 ppm water hardness mean?
144 ppm means there are 144 parts per million of calcium carbonate dissolved in the water. This is equivalent to 10.1 Clark degrees, 8.1 German degrees, or 14.4 French degrees. Water above 180 ppm is generally considered hard.

Learn More

All postcodes in Durham Northumbrian Water coverage Hard water effects on your home Solutions for hard water

Get updates for DH1

We'll notify you when Northumbrian Water reports changes to water hardness in your area.