The Minister for Transport and Tourism, Leo Varadkar, has criticised Dublin City Council for its handling of the water crisis.
A third of the population remains on restricted pressure or without water every night due to problems at a reservoir in County Kildare.
More than 1.5 million people are affected by the shortages across Dublin, Kildare and Wicklow, following a problem at a water treatment plant.
The Council says the restrictions will continue until at least Monday, and possibly further into next week.
It has still not been made clear what the problem is - other than that chemists have had to be brought in from the UK to assist.
Minister Leo Varadkar says it should have been handled much better:
It's hard to know what the extent of the problem is … but obviously anything that affects business or affects tourism – I'm concerned about," Varadkar said.
"I do think the city council could have done a better job in terms of communications - we know the problem if in Ballymore Eustace [water treatment plant], but we don't know what the problem is."
Meanwhile, businesses are also expressing frustration at a lack of information from the council.
Many restaurants and hotels are making contingency plans in place to get water elsewhere over the busy weekend period.
"I don’t think that anybody really knows - I don't think that they know themselves. And that's worrying for anyone trying to run a business," said Paraic Hayden, head chef at Camden Kitchen in Dublin city centre.
"If you're going to invest in tanks to get you through the evenings … it it's going to be over a period of three or four days, then well and good … [but if not] then bigger plans need to be put in place."