Postcode coordinates
Postcodes.io
Converts the submitted postcode to an approximate point using regularly updated open postcode data. No authentication is required.
Read documentation ↗Source register
Sources used by this checker
These records were reviewed 27 July 2026. The checker stops returning definite answers on 31 July 2026 until the sources are checked again.
Run a cautious checkSupplier estimate
Environment Agency Water Resource Zones
Open Government Licence. Dataset revised 2025-10-08 and retrieved 2026-07-27. Boundaries are simplified for candidate matching, not property-level proof.
Open dataset ↗National cross-check
Water UK
Used to identify the national set of reported restrictions and cross-check supplier coverage.
Open source ↗Supply confirmation
Water UK supplier finder
Separately run by Landlord TAP and used when the user does not know the drinking-water supplier. It may not contain every address.
Find supplier ↗Water company sources
Restriction evidence
Each row keeps scope, effective date and any source limitation together.
Affinity Water
Affinity Water temporary use ban
Recorded scope
Central region only: Bedfordshire, Berkshire, Buckinghamshire, Hertfordshire, Surrey and parts of London and Essex.
Evidence note
Affinity’s own page gives 17 July as the enforceable date. Water UK lists 10 July, so the supplier’s primary date is retained and the conflict is disclosed.
Anglian Water
Anglian Water hosepipe restrictions
Recorded scope
All customers across the Anglian Water supply region.
Evidence note
The supplier page says the ban remains in place for all customers across its region.
Cambridge Water
Cambridge Water temporary hosepipe ban
Recorded scope
All customers across the Cambridge Water supply region.
Evidence note
The supplier page states that restrictions are enforceable across the Cambridge Water region.
Southern Water
Southern Water hosepipe restrictions
Recorded scope
Southern Water supply areas in Hampshire and on the Isle of Wight.
Evidence note
The supplier page states that restrictions are in place for customers in Hampshire and on the Isle of Wight and links its 2026 public notice.
South East Water
South East Water temporary use bans
Recorded scope
All South East Water supply areas: Kent, Sussex, Surrey, Hampshire and Berkshire.
Evidence note
The supplier page states that all of its supply areas now have restrictions.
South West Water
South West Water hosepipe ban
Recorded scope
Mid Devon and parts of East Devon and Dorset, including the named towns on the supplier page.
Evidence note
The supplier directs customers to its own postcode checker because network boundaries do not follow postcode districts cleanly.
Thames Water
Thames Water legal notice
Recorded scope
The whole Thames Water supply area.
Evidence note
The legal notice applies to water supplied by Thames Water, including where another company bills on its behalf.
Dŵr Cymru Welsh Water
Dŵr Cymru Welsh Water hosepipe ban
Recorded scope
Mid and south Ceredigion, parts of north Pembrokeshire and north Carmarthenshire.
Evidence note
The supplier says roughly 33,000 properties are affected and provides its own property-level postcode checker.