MK — Milton Keynes
Who supplies water in the MK postcode area?
Anglian Water and Affinity Water supply addresses in MK, which covers Milton Keynes, Bletchley, Newport Pagnell, Buckingham and Olney. Water is not a market you can shop in — the supplier comes with the address.
Anglian Water
Water and sewerageSupplies water and takes waste water across the east of England, from Lincolnshire and Northamptonshire down to Essex. It is the largest water and sewerage company in England and Wales by area.
Affinity Water
Water onlySupplies drinking water to parts of Hertfordshire, Bedfordshire, Buckinghamshire, Essex, Surrey and north-west London. It does not take waste water away, so a second company — usually Thames Water, Anglian Water or Southern Water — handles sewerage and often bills for both.
More than one company appears here either because MK 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 MK postcode area
A sample, not the full list. MK is the postcode area — the letters before the first digit — so it covers every MK outward code.
Check a different postcode
A few useful answers
Common questions
Who supplies water in the MK postcode area?
Anglian Water and Affinity Water supply parts of the MK postcode area. The supplier is decided by where the property is, not by who lived there before you.
Can I switch water supplier in MK?
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 MK?
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