Water Hardness in North Wales

Water Hardness Across North Wales

The average water hardness in North Wales is 66 ppm, classified as slightly hard. Across 67 postcode districts in the Wales region, hardness ranges from 30 ppm to 109 ppm.

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

By town

Towns in North Wales

Sorted by hardness — tap a town for full details.

Town	Hardness	PPM	Level
Wrexham	66	66 ppm	Slightly Hard

Suppliers

Water Companies in North Wales

Companies supplying water to this county.

Welsh Water (Dwr Cymru)

68 ppm Slightly Hard

All postcodes

Postcodes in North Wales

Every postcode district in the county, sorted by hardness.

Postcode	Town	Hardness	PPM	Level
LL39	Arthog	109	109 ppm	Slightly Hard
LL38	Fairbourne	108	108 ppm	Slightly Hard
LL37	Llwyngwril	107	107 ppm	Slightly Hard
LL69	Penysarn	107	107 ppm	Slightly Hard
LL36	Tywyn	106	106 ppm	Slightly Hard
LL68	Amlwch	106	106 ppm	Slightly Hard
LL35	Aberdovey	105	105 ppm	Slightly Hard
LL67	Cemaes Bay	105	105 ppm	Slightly Hard
LL34	Penmaenmawr	104	104 ppm	Slightly Hard
LL66	Rhosgoch	104	104 ppm	Slightly Hard
LL33	Llanfairfechan	103	103 ppm	Slightly Hard
LL65	Holyhead	103	103 ppm	Slightly Hard
LL32	Conwy	102	102 ppm	Slightly Hard
LL64	Rhosneigr	102	102 ppm	Slightly Hard
LL31	Llandudno Junction	101	101 ppm	Slightly Hard
LL63	Ty Croes	101	101 ppm	Slightly Hard
LL30	Llandudno	100	100 ppm	Slightly Hard
LL62	Bodorgan	100	100 ppm	Slightly Hard
LL61	Llanfairpwllgwyngyll	99	99 ppm	Slightly Hard
LL60	Gaerwen	98	98 ppm	Slightly Hard
LL29	Colwyn Bay	76	76 ppm	Slightly Hard
LL28	Colwyn Bay	75	75 ppm	Slightly Hard
LL27	Trefriw	74	74 ppm	Slightly Hard
LL59	Menai Bridge	74	74 ppm	Slightly Hard
LL26	Llanrwst	73	73 ppm	Slightly Hard
LL58	Beaumaris	73	73 ppm	Slightly Hard
LL25	Dolwyddelan	72	72 ppm	Slightly Hard
LL57	Bangor	72	72 ppm	Slightly Hard
LL24	Betws Y Coed	71	71 ppm	Slightly Hard
LL56	Y Felinheli	71	71 ppm	Slightly Hard
LL23	Bala	70	70 ppm	Slightly Hard
LL55	Caernarfon	70	70 ppm	Slightly Hard
LL22	Abergele	69	69 ppm	Slightly Hard
LL54	Caernarfon	69	69 ppm	Slightly Hard
LL21	Corwen	68	68 ppm	Slightly Hard
LL53	Pwllheli	68	68 ppm	Slightly Hard
LL20	Llangollen	67	67 ppm	Slightly Hard
LL52	Criccieth	67	67 ppm	Slightly Hard
LL51	Garndolbenmaen	66	66 ppm	Slightly Hard
LL19	Prestatyn	43	43 ppm	Soft
LL18	Rhyl	42	42 ppm	Soft
LL17	St Asaph	41	41 ppm	Soft
LL49	Porthmadog	41	41 ppm	Soft
LL16	Denbigh	40	40 ppm	Soft
LL48	Penrhyndeudraeth	40	40 ppm	Soft
LL15	Ruthin	39	39 ppm	Soft
LL47	Talsarnau	39	39 ppm	Soft
LL14	Wrexham	38	38 ppm	Soft
LL46	Harlech	38	38 ppm	Soft
LL78	Brynteg	38	38 ppm	Soft
LL13	Wrexham	37	37 ppm	Soft
LL45	Llanbedr	37	37 ppm	Soft
LL77	Llangefni	37	37 ppm	Soft
LL12	Wrexham	36	36 ppm	Soft
LL44	Dyffryn Ardudwy	36	36 ppm	Soft
LL76	Llanbedrgoch	36	36 ppm	Soft
LL11	Wrexham	35	35 ppm	Soft
LL43	Talybont	35	35 ppm	Soft
LL75	Pentraeth	35	35 ppm	Soft
LL42	Barmouth	34	34 ppm	Soft
LL74	Tyn Y Gongl	34	34 ppm	Soft
LL41	Blaenau Ffestiniog	33	33 ppm	Soft
LL73	Marianglas	33	33 ppm	Soft
LL40	Dolgellau	32	32 ppm	Soft
LL72	Moelfre	32	32 ppm	Soft
LL71	Llannerch Y Medd	31	31 ppm	Soft
LL70	Dulas	30	30 ppm	Soft

Test Your Water in North Wales

At 66 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.

View on Amazon

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