AL — St Albans

Who supplies water in the AL postcode area?

Affinity Water supplies addresses in AL, which covers St Albans, Welwyn Garden City, Hatfield, Harpenden and Radlett. Water is not a market you can shop in — the supplier comes with the address.

Affinity Water

Water only

Supplies 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 about Affinity Water Official site ↗

Places in the AL postcode area

  • St Albans
  • Welwyn Garden City
  • Hatfield
  • Harpenden
  • Radlett

A sample, not the full list. AL is the postcode area — the letters before the first digit — so it covers every AL outward code.

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A few useful answers

Common questions

Who supplies water in the AL postcode area?

Affinity Water supplies water in the AL postcode area. The supplier is decided by where the property is, not by who lived there before you.

Can I switch water supplier in AL?

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.

Who takes the waste water away in AL?

Affinity Water supplies the drinking water only. A separate company handles the sewerage, and it often collects both charges on one bill.

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.

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