Is tap water safe to drink in Northern Ireland?

Water suppliers in Northern Ireland

Each supplier's own record from its regulator, company-wide. Your postcode tells you which supplier serves your address.

• NI Water

  NI Water supplies all public drinking water in Northern Ireland, so the figure above is its record.

We identify Northern Ireland postcodes by their BT prefix only.

Water hardness in Northern Ireland

Each supplier's hardness from the supply-zone figures it publishes. Your own zone can differ: enter your postcode above for its figure.

Town reports in Northern Ireland

• Belfast tap water report

Frequently asked questions

Is Northern Ireland tap water safe to drink?

NI Water: 99.87% of samples at customers' taps met standards in 2024 (DWI Northern Ireland, latest report). The figure is for Northern Ireland as a whole, from the Drinking Water Inspectorate for Northern Ireland. Each water supplier's own record is on this page, and your postcode gives the record for the supplier at your address.

Who supplies tap water in Northern Ireland?

NI Water supplies public drinking water in Northern Ireland.

Is tap water in Northern Ireland hard or soft?

It depends on the supplier and the supply zone: NI Water: no published figure we can read. Enter your postcode for your own zone's figure.

How do you place Northern Ireland postcodes?

We identify Northern Ireland postcodes by their BT prefix only. NI Water supplies public drinking water across Northern Ireland, so a BT postcode is answered with NI Water's record.