Wales · County

Water hardness in Gwent

Average 83 ppm across 18 postcodes and 1 towns.

  • Range 42–119 ppm
  • Towns 1
  • Suppliers Welsh Water (Dwr Cymru)
County average
83
ppm CaCO₃
Slightly Hard
Soft
Moderate
Hard
Very hard
0100200300400+
83
Avg ppm
42
Min ppm
119
Max ppm
18
Postcodes

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Water Hardness Across Gwent

The average water hardness in Gwent is 83 ppm, classified as slightly hard. Across 18 postcode districts in the Wales region, hardness ranges from 42 ppm to 119 ppm.

Gwent is served by Welsh Water (Dwr Cymru). With slightly hard water, limescale is unlikely to be a major concern in most homes.

Hardness across Gwent ranges from 42 ppm to 119 ppm by postcode district. The county spans 1 towns and 18 postcode districts in total.

At 83 ppm, Gwent ranks as slightly hard water nationally. Compare it against the 50 softest water areas in the UK.

By town

Towns in Gwent

Sorted by hardness — tap a town for full details.

Town Hardness PPM Level
Newport
83
83 ppm Slightly Hard
Suppliers

Water Companies in Gwent

Companies supplying water to this county.

Welsh Water (Dwr Cymru)

68 ppm Slightly Hard
All postcodes

Postcodes in Gwent

Every postcode district in the county, sorted by hardness.

Postcode Town Hardness PPM Level
NP19 Newport
119
119 ppm Slightly Hard
NP18 Newport
118
118 ppm Slightly Hard
NP16 Chepstow
116
116 ppm Slightly Hard
NP15 Usk
115
115 ppm Slightly Hard
NP13 Abertillery
113
113 ppm Slightly Hard
NP12 Blackwood
112
112 ppm Slightly Hard
NP44 Cwmbran
112
112 ppm Slightly Hard
NP11 Newport
111
111 ppm Slightly Hard
NP10 Newport
110
110 ppm Slightly Hard
NP8 Crickhowell
64
64 ppm Slightly Hard
NP7 Abergavenny
63
63 ppm Slightly Hard
NP4 Pontypool
60
60 ppm Soft
NP26 Caldicot
48
48 ppm Soft
NP25 Monmouth
47
47 ppm Soft
NP24 New Tredegar
46
46 ppm Soft
NP23 Ebbw Vale
45
45 ppm Soft
NP22 Tredegar
44
44 ppm Soft
NP20 Newport
42
42 ppm Soft

Test Your Water in Gwent

At 83 ppm on average, your water is slightly hard. A home testing kit lets you verify the exact hardness for your postcode 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.

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FAQ

Water Hardness in Gwent: Common Questions

Is the water in Gwent hard or soft?
Gwent has slightly hard water, averaging 83 ppm across 18 postcode districts. Limescale build-up is minimal at this level, though individual postcodes vary.
Where is the hardest water in Gwent?
Across Gwent, water hardness ranges from 42 ppm to 119 ppm by postcode district.
Which water company supplies Gwent?
Gwent is supplied by Welsh Water (Dwr Cymru). You can check each supplier's reported hardness figures on their water company page.
Do I need a water softener in Gwent?
At 83 ppm, Gwent has soft water and a whole-house softener is not needed.
What is the average water hardness in Gwent?
The average water hardness in Gwent is 83 ppm (parts per million), classified as slightly hard. It ranges from 42 ppm to 119 ppm across 18 postcode districts in the Wales region.

Hard Water Guides

Learn more about water hardness and how to manage it.

What Is Water Hardness? Hard Water Effects Solutions Water Softener Guide
All counties in Wales · Hardest water areas · Softest water areas · Hard water solutions
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