The utility’s plans for massive borrowing were thrown into disarray when the agency Eurostat insisted it was not independent of Government debt.
The ruling meant money raised on the markets in order to finance an ambitious repair programme would have to be lumped in with State debt.
However, Mr Varadkar insisted this was just a “relatively minor setback.”
Clare TD Michael McNamara — who hopes to stand again as a Labour candidate in the general election despite having the whip taken away from him for voting against Government policy on the Aer Lingus sell-off — warned Mr Varadkar was not facing facts.
“He is absolutely wrong. The only way you could take that view is if you were looking at the HSE everyday, then Irish Water might seem fine to you.
“Eurostat basically said this is doing nothing new, Irish Water is controlled by the State, and the Government is meddling in it,” Mr McNamara said.
Mr Varadkar claimed Eurostat would reverse its decision next year when more people had paid up.
“It’s still a work in progress. There’s no doubt that Eurostat’s decision was a setback. It’s probably a temporary one though,” Mr Varadkar said.
“I think Irish Water is the right thing to do. First of all because metering allows us to identify leaks and actually fix them now; it also promotes conservation, people using less water; it’s giving us the revenue stream that we need to invest more in water infrastructure which was neglected for decades.
“What’s gone against us is the way we account for it in public accounts and as I say that can change next year. As you know 48% of people have paid already and I do think that will rise.”
Fianna Fáil finance spokesperson Barry Cowen said the Irish taxpayer was €785m worse off because of Irish Water.
“When the Government unveiled the Water Conservation Grant last year it was clearly designed to try and help Irish Water pass the Eurostat test. This plan has backfired spectacularly,” he said.
“The Government is wasting €5m per annum on administrating the Water Conservation Grant. This is money which could be spent on improving water infrastructure, but instead it is being spent on a pointless grant which has failed in its key objective of helping Irish Water pass the Eurostat test.
“The fact is that not an extra cent is being spent on water infrastructure above the €500m per annum Fianna Fáil spent in Government. The establishment of Irish Water has been a costly mistake for Irish taxpayers. The super quango is swallowing vast quantities of public money on a daily basis while giving little in return when it comes to improving the quality of our water infrastructure.
“Just what exactly is the purpose of the Water Conservation Grant considering it is unlikely to lead to water conservation and has not led to Irish Water passing the Eurostat test?
“Irish Water is set to cost the Government up to €70m this year alone. It is time to abolish the super quango instead of throwing more good money after bad,” Mr Cowen said.
Sinn Féin finance spokesperson Pearse Doherty demanded more transparency on Irish Water’s finances.