DT — Dorchester
Who supplies water in the DT postcode area?
Wessex Water and South West Water supply addresses in DT, which covers Dorchester, Weymouth, Bridport, Sherborne and Blandford Forum. Water is not a market you can shop in — the supplier comes with the address.
Wessex Water
Water and sewerageSupplies water and takes waste water across the south-west of England — Dorset, Somerset, Wiltshire and parts of Gloucestershire and Hampshire. In Bristol the drinking water comes from Bristol Water and Wessex Water handles the sewerage.
South West Water
Water and sewerageSupplies water and takes waste water across Cornwall and Devon and parts of Dorset and Somerset. It also trades as Bournemouth Water in the area around Bournemouth.
More than one company appears here either because DT 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 DT postcode area
A sample, not the full list. DT is the postcode area — the letters before the first digit — so it covers every DT outward code.
Check a different postcode
A few useful answers
Common questions
Who supplies water in the DT postcode area?
Wessex Water and South West Water supply parts of the DT postcode area. The supplier is decided by where the property is, not by who lived there before you.
Can I switch water supplier in DT?
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 DT?
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.
Moving somewhere new? Keep the search in one place.
We Want To Rent holds the places you're considering, the viewings you've booked and the details everyone in the household needs, instead of a group chat nobody can search.
Start a rent hunt