ARDEE Water Treatment Plant is operating at full production levels since 10am yesterday and the main reservoir located at Sliabh Breagh is refilling slowly, according to Irish Water.
Most areas in Ardee had normal water supply restored from yesterday afternoon with the exception of those areas served by the Blakestown reservoir in Blakestown, Kilpatrick, Cluide, Rathgory, Mullameelan, Mulladrillen, Stabannan, Dromin and surrounding areas.
The water supply was expected to be restored to these areas later in the evening.
Currently, limited supply is been pumped to Blakestown Reservoir.
To supplement this, two tankers brought water to the reservoir and this continued throughout the night until the water level refilled.
It was expected that water supply levels would return to normal overnight.
Irish Water was also back feeding water to Ardee from Collon to increase the level of available water for customers.
This is primarily due to the configuration of the network and water pressure variations in the area.
"We apologise to customers for the inconvenience caused as a result of the outage and thank them for their patience will we work to restore a water supply to all customers, said an Irish Water spokesperson.
Customers can contact the Irish Water customer care helpline 24/7 on 1850 278 278 or visit www.water.ie or on Twitter @IWCare for updates or with any queries.