Uisce Eireann say they are investigating reports of supply disruptions affecting Carnamoyle, Burnfoot, Muff, and surrounding areas in Inishowen.
Reports of disruptions affecting Fintown and surrounding areas are also being investigated, as are reports of disruptions to supplies in the Sylvan Park, Kiltoy, and Ballyraine areas of Letterkenny.
In each case, Uisce Eireann says crews are working to resolve outstanding issues as quickly as possible.
