SY — Shrewsbury
Who supplies water in the SY postcode area?
Severn Trent, Hafren Dyfrdwy and Dŵr Cymru Welsh Water supply addresses in SY, which covers Shrewsbury, Oswestry, Welshpool, Newtown and Ludlow. Water is not a market you can shop in — the supplier comes with the address.
Severn Trent
Water and sewerageSupplies water and takes waste water across the Midlands, from the Bristol Channel to the Humber, including Birmingham, Coventry, Derby, Leicester and Nottingham.
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.
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.
More than one company appears here either because SY 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 SY postcode area
A sample, not the full list. SY is the postcode area — the letters before the first digit — so it covers every SY outward code.
Check a different postcode
A few useful answers
Common questions
Who supplies water in the SY postcode area?
Severn Trent, Hafren Dyfrdwy and Dŵr Cymru Welsh Water supply parts of the SY postcode area. The supplier is decided by where the property is, not by who lived there before you.
Can I switch water supplier in SY?
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 SY?
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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