Irish Water has been working with Cork County Council to restore water as quickly as possible to properties in Freemount and surrounding areas following issues at Freemount water treatment plant.
Repairs are now complete but Irish Water has said it generally takes two to three hours after this to restore normal supply to all customers affected by an unplanned outage.
However, they have warned that water supply may not return until later tonight to customers located on higher ground and extremities of the network.
Neil Smyth, Irish Water Operational Lead said: “The repairs have been completed as quickly and efficiently as possible to minimise disruption to the area and restore water for all customers.
Irish Water's customer care team is available 24/7 on 1800 278 278 and can also be contacted on Twitter @IWCare.
For further updates see www.water.ie