Residents have been telling of their ordeal after going days with no water supply - and being told it could be early next week until it is restored.
Diane McKay lives in an isolated part of Co Down near Castlewellan and has been without water since Monday. She has three children aged under three, including a baby aged under one.
Her husband farms 300 cattle and has been forced to draw water from a nearby river.
Mrs McKay said: "We have been sick from Christmas Day and from Monday we have had no water in the house. You cannot flush the toilets, you cannot get washed, it is a disaster.
"Banbridge Council said there was nothing more they could do. They sent out eight litres of water on Tuesday."
She said she was concerned the river, which is a lifeline for the animals, would run dry because of the frequent trips to fill up tankers.
Phillip Dempster, 31, from south Belfast, has been suffering from interrupted supplies since the thaw began just after Christmas Day.
"It is just terrible, having to queue for water, it just should not happen," he said.
"I have young children at home with the school holidays, it is just dreadful."
Mr Dempster, an engineer, added: "I was looking forward to a nice relaxed Christmas break. Now I cannot even have a shower. It is just a disgrace and those up at Stormont should be ashamed of themselves."