Irish Water is working with Galway County Council to restore water supply to customers in Moylough and surrounding areas.
Crews are working to repair the burst watermain as quickly and as safely as possible.
Customers on the Kilkerrin Moylough Public Supply, specifically Moylough Village and the wider Cooloo area and surrounds may be impacted by disruption to their supply.
The repairs are expected to be completed by 9pm and normal water supply will begin to be restored, while full water supply may take 1-2 hours to return as water refills the network.
Irish Water and Galway County Council regrets any inconvenience caused.