Northern Ireland Water
Contact details for Northern Ireland Water, the sole provider of water and sewerage services in Northern Ireland
PO Box 1026
Belfast
BT1 9DJ
United Kingdom
Leakline
0800 028 2011
Billing queries
(Lines open from 8.00 am to 8.00 pm, Monday to Friday, Saturday from 8.00 am to 6.00 pm and Sunday from 12.00 pm to 6.00 pm)
0845 877 0030
Email
waterline@niwater.com
Website
Northern Ireland Water
For Customer billing issues, you can also email customer.billing@niwater.com