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:0345 877 0030
(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)
Email
waterline@niwater.com
Website
Northern Ireland Water
For Customer billing issues, you can also email customer.billing@niwater.com