Irish Water is working with Wicklow County Council to carry out urgent repairs following a significant burst to a water main on the Woodstock road area impacting homes and businesses in Newtownmountkennedy, Kilcoole Village and surrounding areas.
Crews are on site working to restore the water supply to impacted customers as quickly and as safely as possible.
Some homes and businesses are advised to expect disruption to their supply including low pressure and outages.
Full water supply may take up to two hours to return as water refills the network.