The outage is required to complete ongoing upgrade works.
Water supply in parts of Offaly will be cut off tonight.
Irish Water says an overnight outage is required to complete ongoing upgrade works to Tullamore's water network.
The works, which began early last month, involve the replacement of over 1.3 kilometres of old cast-iron mains on the Clara Road exiting the town that were prone to leakage.
The outage will be in place between midnight tonight and 4 o'clock tomorrow morning - although customers are advised it can take two to three hours for supply to fully return.
The affected areas are...
- Collins Lane North
- Carraig Cluin
- Clara Road
- Tully North
- Burlington Business Park
- Axis Business Park.
Speaking about these works, Joe Carroll, Irish Water’s Regional Lead, commented;
"These works are vital to ensure a more secure water supply to homes and businesses in Tullamore and are part of a significant investment by Irish Water to safeguard the water supply. We understand this type of work can be inconvenient and we will ensure our work crews make every effort to minimise any disruption these works may cause."
Irish Water's customer care helpline is open 24/7 on 1800 278 278 and they can also be contact on Twitter @IWCare.