Night-time water restrictions have been lifted for homes and businesses across Dublin after reservoir supplies improved.
Dublin City Council called on householders to conserve water as it continues to reduce pressure in cold taps.
Chief engineer Michael Philips said while water capacity at the affected Ballymore Eustace treatment plant - one of the country's biggest - is still below normal levels, it is acceptable.
"What we will be doing over the next number of weeks is a pressure-reducing exercises rather then turning off water," he said.
"Hopefully we can build up storage to be ready for the Christmas season and also cold weather if it should hit us."
Up to 1.2 million people across Greater Dublin, parts of Kildare and Wicklow were hit nightly with water restrictions, with supplies drying up in many areas between 8pm and 7am.
The restrictions, announced 10 days ago, were due to run again tonight.
Environment Minister Phil Hogan said the restrictions were caused by a problem with the water being treated at the Ballymore Eustace plant.
"That problem has now been resolved," he said.
"Having visited Ballymore Eustace Water Treatment on Monday and seen the efforts made to address the problem, I must commend the tireless efforts made by the engineers in Dublin City Council in getting this matter sorted out.
"They were faced with an unprecedented situation on which they worked around the clock to resolve."
It is suspected the dry summer followed by periods of heavy rain over recent weeks has created an unusual balance in the water.