Irish Water blamed a faulty valve for the service disruption which affected the Mayfield and Montenotte areas most.
A spokesperson for the company said they became aware of the issue via text message to Cork County Council at 5am that there was an issue with water supply.
“An automated sluice valve at the outlet to Cork city high reservoir was identified as the source of the issue,” the spokesperson said.
“The cause of the failure with the valve is currently being investigated.”
Deaglán Ó Deargáin, the principal of Gaelscoil an Ghoirt Álainn in Mayfield, said he became aware of the problem when the school caretaker discovered they had no water supply just before the school was due to open.
The school’s deputy principal contacted City Hall for clarification but when it became clear that the water supply may not be restored for several hours, Mr Ó Deargáin said they decided to close the school for health and safety reasons.
“Because we are in temporary accommodation, we have no water holding tanks, and would not have been able to flush toilets or run taps. We had no option really but to close,” he said.
Texts were sent to parents but several were already on their school run, or had already dropped their children to school, and had to make last-minute alternative arrangements.
During the morning, Irish Water said repair crews were on site working to repair the fault. But they said that water supply would not be restored before 2pm.
Most households had water supply restored by mid-afternoon but people reported severe discolouration as their supply returned.
“Householders are advised to run taps until water runs clear,” Irish Water said.
“Water pressure may be slightly lower than usual until the mains are fully recharged.”
Northside Worker’s Party Cllr Ted Tynan said when he contacted Irish Water for an update, he was told city council workers were called in to fix the fault.
“It’s ironic when at the first major sign of trouble in Cork City since they took over responsibility for water services on January 1, that they rush back to the local authority to fix it. There’s a lesson in there for us all,” he said.
The fault in Cork City was one of several Irish Water had to deal with yesterday. It reported burst pipes in Union Hall and Clonakilty in West Cork, affecting supply in Reen, Rosscarbery, Castlefreke and Owenahincha, Co Cork, and problems with pumps affecting supply to Crookstown and Cloughduv.
Cork: Water disruptions to the Crookstown, Cloghduv area due to issues with supply pumps. Working to resolve this issue & restore ASAP.— Irish Water (@IrishWater) June 16, 2014
It also reported disruptions to supply in areas around Tipperary town, in Roscommon, in Donegal where a burst mains interrupted supply to Feddyglass, Ballylennon, Woodlands, Glasbolie, Ballintra, Ballymagroarty, in Kerry where a burst mains affected supply to parts of Dingle town, and in Kilkenny where a burst mains affected supply to Kells and Dunamaggin.
Residents of a house in Cork City had to be evacuated yesterday after the installers of water meters damaged a gas pipe.
Bord Gáis Networks confirmed yesterday that a gas leak at the house in Manor Grove in Rochestown led to the temporary evacuation of a house in the estate.
A spokesperson for Bord Gáis Networks said that it was notified at 8:43am of third party damage to a gas pipe supplying a house in Manor Grove.
“A Bord Gáis Networks fitter arrived on site at 9:07am,” the spokesman said. “The fitter confirmed that there was a gas leak due to third-party damage and requested further assistance.
“Gas was detected inside the house and four people were temporarily evacuated for safety reasons. No gas was detected in any neighbouring properties.”
The spokesman said the gas leak was made safe and that a Bord Gáis crew remained on site working to complete the repair for a time afterwards.
The spokesman also said the pipe was damaged by contractors installing water meters on behalf of Irish Water.