Up to 40pc of water supply to be lost through leaks
The majority of local authorities are losing almost half of their water supply through leaks.
Despite targets agreed with Irish Water to address the issues, the situation is not expected to improve before the end of the year.
In figures released to RTE News, most areas are experiencing 40pc water leakage while five councils expect to still lose most of their treated water to leaks.
One of the measures to reduce leakages will include a reduction in water pressure in some parts of the network, according to Irish Water.
In most counties the target is to reduce the leakage rates by two percentage points by the end of 2015.
Counties Cork, Mayo, Kerry, Tipperary and Roscommon are the areas losing more than half their supply to leaks.
Speaking on RTÉ's Morning Ireland, Jerry Grant, Head of Assets at Irish Water, said pressure management will be a crucial part of this process.
“There are thousands of leaks across the network. There is no silver bullet solution. This effort will have to be maintained indefinitely.”