Water Hardness in North Wales

Wales • 67 postcode districts • 1 towns

Slightly Hard

Average ppm

Minimum ppm

109

Maximum ppm

Postcodes

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.

Towns in North Wales

Town	Avg Hardness	PPM	Level
Wrexham	66 ppm	66 ppm	Slightly Hard

Water Companies in North Wales

Welsh Water (Dwr Cymru)

Average: 68 ppm (Slightly Hard)

All Postcodes in North Wales

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

Hard Water Guides

Learn more about water hardness and how to manage it.

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