The reservoirs have filled sufficiently to allow supply to return however, due to increased demand restrictions will be in place again tonight and for the next few nights until demand regularises and the water treatment plant can meet the demand needs.
It may take several hours for all sections of the network to get water supply.
Customers are being asked to conserve water to avoid reservoirs emptying and water pressure to homes and businesses being affected.
Night time restrictions on the Tully and Letterfrack supplies has enabled the reservoirs to refill to some degree and full supply has been restored this morning.
Irish Water would like to thank customers supplied by these schemes for adhering to our water conservation notice yesterday.
A repair crew travelled to the island this morning (Saturday) to carry out repairs.
Customers on the island are urged to conserve water.
Bottled water is available at Inishbofin pier from 12.30pm.
Williamstown is suffering a major water supply issue and leak repair crews will be undertaking work in the town today to try to restore supply.
The following areas are experiencing low pressure and/or loss of supply due to an increase in demand and some issues at treatment plants: Kilkerrin/Moylough, Mountbellew, Dunmore/Glenamaddy, Ahascragh, Williamstown and Tuam.