The issue is expected to be repaired later this evening.
A burst water main is affected supply to homes and businesses in Offaly.
Irish Water says crews are currently working to repair the burst main serving Blundell Wood, Edenderry and surrounding areas.
The works are expected to continue until 5 o'clock this evening, although customers are advised to allow two or three hours for supply to fully return.
Irish Water is encouraging those affected to conserve water for essential purposes while repairs are underway.
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