The hosepipe ban which has been in place in Mullingar, Co Westmeath, Milford in Co Donegal and the Kells and Oldcastle areas of Co Meath since early May has been extended by another seven weeks.
It is set to remain in place until after the August Bank Holiday.
Uisce Éireann said while recent weeks have brought cooler and wetter weather, water supplies in several parts of the country remain under significant pressure.
Nationally, 21 supplies remain in drought status, and Uisce Éireann said it continues to monitor and manage these areas closely.
It said that it would take several weeks of sustained rainfall to allow affected water sources to recover to normal levels.
It said that forecasts also indicate a likely return to warmer, drier weather from next week, which could further increase demand and place additional strain on already stressed supplies.
"Although we've seen some welcome rainfall, the long-term effects of a dry autumn, winter and spring are still being felt" said Margaret Attridge, Head of Water Operations at Uisce Éireann.
"Some water sources have not recovered to sustainable levels, and so extending the water conservation order is necessary to protect these vulnerable supplies" she added.
"Nationally there are 21 locations across the country which remain in drought status across counties Westmeath, Donegal, Meath, Cork, Clare, Galway, Waterford, Wexford, Tipperary, Offaly and Laois".
A water conservation order, commonly referred to as a hosepipe ban, prohibits the use of garden hosepipes and other non-essential uses of water by domestic users and commercial premises for non-commercial activities.
The prohibited water uses during the hosepipe ban include the use of water drawn through a hosepipe or similar apparatus for the purpose of:
- Watering a garden
- cleaning a private motor-vehicle using a domestic hosepipe
- cleaning a private leisure boat
- filling or maintaining a domestic swimming or paddling pool (except when using hand-held containers filled directly from a tap)
- filling or maintaining a domestic pond (excluding fish ponds)
- filling or maintaining an ornamental fountain (with the exception of such use for commercial purposes)
- filling or replenishing an artificial pond, lake or similar application.
The conservation order, which was issued initially on 6 May, will remain in place until 4 August.
