LL — Llandudno
Who supplies water in the LL postcode area?
Dŵr Cymru Welsh Water and Hafren Dyfrdwy supply addresses in LL, which covers Llandudno, Bangor, Wrexham, Colwyn Bay and Holyhead. Water is not a market you can shop in — the supplier comes with the address.
Dŵr Cymru Welsh Water
Water and sewerageSupplies water and takes waste water across most of Wales and parts of Herefordshire and Cheshire. It is run on a not-for-profit basis and has no shareholders.
Hafren Dyfrdwy
Water and sewerageSupplies water and sewerage services in parts of north and mid Wales along the Severn and the Dee. It is the Welsh arm of Severn Trent and the smallest of the water and sewerage companies.
More than one company appears here either because LL straddles a boundary, or because one company supplies the drinking water while another takes the waste water away. Your bill will say which applies to your address.
Places in the LL postcode area
A sample, not the full list. LL is the postcode area — the letters before the first digit — so it covers every LL outward code.
Check a different postcode
A few useful answers
Common questions
Who supplies water in the LL postcode area?
Dŵr Cymru Welsh Water and Hafren Dyfrdwy supply parts of the LL postcode area. The supplier is decided by where the property is, not by who lived there before you.
Can I switch water supplier in LL?
No. Household water supply is not a competitive market anywhere in the UK — there is one supplier for each address and no tariff to compare. What you can change is how you are charged, by asking for a meter.
Why does this page list more than one company for LL?
A postcode area can straddle a boundary, and in much of England the company that supplies the taps is not the one that takes the waste water away. Both appear here so you can check which applies to your address.
Do I need to open a water account when I move in?
Yes. Tell the supplier the day your tenancy starts and give an opening meter reading if the property has a meter, so you are not billed for what the last tenant used.
Where to confirm this
We hold the supplier at postcode-area level, which is coarse enough to be wrong at a boundary. These are the industry's own sources, and they settle it for a specific address.
- Water UK: find your supplier ↗
- the Consumer Council for Water: complaints and advice ↗
- Discover Water: bills by company ↗Sector average £639 a year for 2026–27.
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