Much of the town centre may be affected.
Emergency leak detection works are taking place in Naas today.
Kildare County Council says the project is likely to affect supply to Chadwicks store, Ardconagh, Our Ladys Place, Sarto Road, St Davids Terrace, Devoy Quarter apartments, Gabriels Place, Pacelli Road, Gigginstown Park and surrounding areas
Detection works begin at 11am and are not scheduled for completion until 3pm.
It could take up to three hours for the system to refill and for normal supply to resume.

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