Irish Water has extended the hosepipe ban in some areas to Sunday, 30 September.
The Water Conservation Order remains in place for Dublin, Louth, Meath, Kildare, Kilkenny, Laois, Offaly, Westmeath, Carlow, Wicklow, Wexford, Waterford, Cork, Kerry, Limerick and Tipperary.
The company said it is appealing to customers to continue to conserve water as raw water supplies in rivers, lakes and ground water sources remain lower than normal.
It said water conservation efforts made to date are helping to restore levels but further conservation is needed.
The Water Conservation Order has been lifted for the north west of the country due to increased rainfall and the conservation measures over the last two months.