North Wales · Wales

Is Wrexham water hard or soft?

Slightly Hard at 66 ppm · 67 postcode districts

  • Supplier Welsh Water (Dwr Cymru)
  • County North Wales
  • Postcodes 67
Area average
66
ppm CaCO₃
Slightly Hard
Soft
Moderate
Hard
Very hard
0100200300400+

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The average water hardness in Wrexham is 66 ppm, classified as slightly hard. Wrexham is served by Welsh Water (Dwr Cymru), covering 67 postcode districts across North Wales in the Wales region.

Hardness varies across the area — see the table below for a breakdown by postcode district. LL39 has the hardest water at 109 ppm, while LL70 is the softest at 30 ppm.

By postcode

Water Hardness by Postcode in Wrexham

Sorted by hardness — tap a postcode for full details.

Postcode Water Company Hardness PPM Level
LL39 Welsh Water (Dwr Cymru)
109
109 ppm Slightly Hard
LL38 Welsh Water (Dwr Cymru)
108
108 ppm Slightly Hard
LL37 Welsh Water (Dwr Cymru)
107
107 ppm Slightly Hard
LL69 Welsh Water (Dwr Cymru)
107
107 ppm Slightly Hard
LL36 Welsh Water (Dwr Cymru)
106
106 ppm Slightly Hard
LL68 Welsh Water (Dwr Cymru)
106
106 ppm Slightly Hard
LL35 Welsh Water (Dwr Cymru)
105
105 ppm Slightly Hard
LL67 Welsh Water (Dwr Cymru)
105
105 ppm Slightly Hard
LL34 Welsh Water (Dwr Cymru)
104
104 ppm Slightly Hard
LL66 Welsh Water (Dwr Cymru)
104
104 ppm Slightly Hard
LL33 Welsh Water (Dwr Cymru)
103
103 ppm Slightly Hard
LL65 Welsh Water (Dwr Cymru)
103
103 ppm Slightly Hard
LL32 Welsh Water (Dwr Cymru)
102
102 ppm Slightly Hard
LL64 Welsh Water (Dwr Cymru)
102
102 ppm Slightly Hard
LL31 Welsh Water (Dwr Cymru)
101
101 ppm Slightly Hard
LL63 Welsh Water (Dwr Cymru)
101
101 ppm Slightly Hard
LL30 Welsh Water (Dwr Cymru)
100
100 ppm Slightly Hard
LL62 Welsh Water (Dwr Cymru)
100
100 ppm Slightly Hard
LL61 Welsh Water (Dwr Cymru)
99
99 ppm Slightly Hard
LL60 Welsh Water (Dwr Cymru)
98
98 ppm Slightly Hard
LL29 Welsh Water (Dwr Cymru)
76
76 ppm Slightly Hard
LL28 Welsh Water (Dwr Cymru)
75
75 ppm Slightly Hard
LL27 Welsh Water (Dwr Cymru)
74
74 ppm Slightly Hard
LL59 Welsh Water (Dwr Cymru)
74
74 ppm Slightly Hard
LL26 Welsh Water (Dwr Cymru)
73
73 ppm Slightly Hard
LL58 Welsh Water (Dwr Cymru)
73
73 ppm Slightly Hard
LL25 Welsh Water (Dwr Cymru)
72
72 ppm Slightly Hard
LL57 Welsh Water (Dwr Cymru)
72
72 ppm Slightly Hard
LL24 Welsh Water (Dwr Cymru)
71
71 ppm Slightly Hard
LL56 Welsh Water (Dwr Cymru)
71
71 ppm Slightly Hard
LL23 Welsh Water (Dwr Cymru)
70
70 ppm Slightly Hard
LL55 Welsh Water (Dwr Cymru)
70
70 ppm Slightly Hard
LL22 Welsh Water (Dwr Cymru)
69
69 ppm Slightly Hard
LL54 Welsh Water (Dwr Cymru)
69
69 ppm Slightly Hard
LL21 Welsh Water (Dwr Cymru)
68
68 ppm Slightly Hard
LL53 Welsh Water (Dwr Cymru)
68
68 ppm Slightly Hard
LL20 Welsh Water (Dwr Cymru)
67
67 ppm Slightly Hard
LL52 Welsh Water (Dwr Cymru)
67
67 ppm Slightly Hard
LL51 Welsh Water (Dwr Cymru)
66
66 ppm Slightly Hard
LL19 Welsh Water (Dwr Cymru)
43
43 ppm Soft
LL18 Welsh Water (Dwr Cymru)
42
42 ppm Soft
LL17 Welsh Water (Dwr Cymru)
41
41 ppm Soft
LL49 Welsh Water (Dwr Cymru)
41
41 ppm Soft
LL16 Welsh Water (Dwr Cymru)
40
40 ppm Soft
LL48 Welsh Water (Dwr Cymru)
40
40 ppm Soft
LL15 Welsh Water (Dwr Cymru)
39
39 ppm Soft
LL47 Welsh Water (Dwr Cymru)
39
39 ppm Soft
LL14 Welsh Water (Dwr Cymru)
38
38 ppm Soft
LL46 Welsh Water (Dwr Cymru)
38
38 ppm Soft
LL78 Welsh Water (Dwr Cymru)
38
38 ppm Soft
LL13 Welsh Water (Dwr Cymru)
37
37 ppm Soft
LL45 Welsh Water (Dwr Cymru)
37
37 ppm Soft
LL77 Welsh Water (Dwr Cymru)
37
37 ppm Soft
LL12 Welsh Water (Dwr Cymru)
36
36 ppm Soft
LL44 Welsh Water (Dwr Cymru)
36
36 ppm Soft
LL76 Welsh Water (Dwr Cymru)
36
36 ppm Soft
LL11 Welsh Water (Dwr Cymru)
35
35 ppm Soft
LL43 Welsh Water (Dwr Cymru)
35
35 ppm Soft
LL75 Welsh Water (Dwr Cymru)
35
35 ppm Soft
LL42 Welsh Water (Dwr Cymru)
34
34 ppm Soft
LL74 Welsh Water (Dwr Cymru)
34
34 ppm Soft
LL41 Welsh Water (Dwr Cymru)
33
33 ppm Soft
LL73 Welsh Water (Dwr Cymru)
33
33 ppm Soft
LL40 Welsh Water (Dwr Cymru)
32
32 ppm Soft
LL72 Welsh Water (Dwr Cymru)
32
32 ppm Soft
LL71 Welsh Water (Dwr Cymru)
31
31 ppm Soft
LL70 Welsh Water (Dwr Cymru)
30
30 ppm Soft
Suppliers

Water Companies Serving Wrexham

Tap for full coverage area and hardness data.

Welsh Water (Dwr Cymru)

68 ppm Slightly Hard

Each water company publishes its own hardness data, so you can cross-check the Wrexham figures here against the published hardness data from Dwr Cymru Welsh Water.

Water Hardness Guides

Learn more about water hardness and how to manage it.

What Is Water Hardness? Effects Solutions Water Softeners Limescale Removal

Test Your Water in Wrexham

At 66 ppm, your water is slightly hard. A home testing kit lets you verify the exact hardness and check for other contaminants.

TESPERT 16-in-1 Water Testing Kit

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

Common questions about Wrexham water

Is Wrexham water hard or soft?
Wrexham is classified as slightly hard, averaging 66 ppm across 67 postcode districts. Limescale build-up is minimal at this level, though individual postcodes vary.
Which postcode in Wrexham has the hardest water?
LL39 has the hardest water in Wrexham at 109 ppm, while LL70 is the softest at 30 ppm. See the full table above for every district.
Which water company supplies Wrexham?
Wrexham is supplied by Welsh Water (Dwr Cymru), covering 67 postcode districts across North Wales.
Is tap water in Wrexham safe to drink?
Yes. All tap water in Wrexham meets UK drinking water standards. Hardness affects taste and limescale buildup but not safety.
Does Wrexham have any harder-water postcodes?
LL39 is the hardest district at 109 ppm (slightly hard), though most of Wrexham averages 66 ppm.
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