Customers supplied by the Cairnhill reservoir in Longford are being warned of overnight water restrictions from tonight until next Saturday July 3rd.
The restrictions will be in place nightly from 11 o' clock tonight until 7am, and will continue each night until next Saturday July 3rd.
Irish Water says a major leak on the network has caused levels in the reservoir to drop significantly and it will take a number of days for levels to recover.
It says the overnight restrictions are needed to allow reservoirs to refill so that essential daytime water supply can be maintained.
Irish Water also warns that while water will be turned back on a 7 am each morning it may take up to 2 hours for supply to be restored to all areas fed by the Carinhill reservoir.
The areas which will be affected by these night-time restrictions, according to a press release issued by Iirsh Water , are; Derrynacross; Cornafunshin; Kilmahon; Letterggeeragh; Lettergullion; Crowdrumman; Brocklagh; Monaduff; Gaigue; Derawley; Dooroc; Cartrongolan; Drumlish area (not village); Sliabh Cairbe Estate, Drumlish Village; Cairn Hill View Estate, Drumlish Village; Cairn Hill View estate; Lettergonnell; Carrickateane; Derreenavoggy; Aghamore Upper; Aghacordrinan; Molly; Gelshagh; Lislea; Aghakilmore; Soran Road; Drumnacooha; Esker South; Clontumpher; Aghaboy; Enybegs and surrounding areas.