Dublin Faces Water Crisis as Shannon Pipeline Faces Delays, Costs Soar to €10.4 Billion

The Greater Dublin Area faces a severe water crisis, with infrastructure designed for 500,000 people now serving a population three times that size. The Liffey River supplies 85% of water for 1.7 million people across Dublin, Meath, Kildare, and Wicklow, with no backup. Approximately one-third of treated water is lost to leaks, down from 49% a decade ago. In November 2025, Uisce Éireann was fined €20 million for missing its leakage reduction target, saving only 90 million litres against a required 176 million litres over four years.

Last August, emergency repairs on a pipeline connecting Ballymore Eustace water treatment plant with Saggart Reservoir, supplying one-third of Greater Dublin’s drinking water, highlighted the system's fragility. Crews had 28 hours to fix five leaks and replace 35 metres of pipe to prevent widespread outages affecting up to 1.7 million people.

The long-term solution, the Shannon water supply project, involves a 170km pipeline from Co Tipperary to south Dublin. The planning application was lodged in December 2025. If approved without delay, construction could begin in 2028 and take five years. The project, in development since the mid-1990s, has seen its estimated cost rise from €500 million to between €4.6 billion and €6 billion, potentially reaching €10.4 billion with delays and redesigns. Local opposition and judicial reviews are expected to cause further delays.

Delays are already impacting housing and investment. Uisce Éireann can supply only 35,000 new homes annually, below the government's 50,000 target. By 2028, new wastewater connections may be impossible in parts of Greater Dublin. The government aims for 300,000 new homes by 2030, half in the Greater Dublin Area. Non-domestic water demand in the east and midlands is projected to grow 73% by 2050, with water scarcity already influencing investment decisions. The water sector will receive €12.2 billion in capital investment between 2026 and 2030, but planning constraints remain a major hurdle. Interim measures like accelerated leakage reduction, water efficiency for data centres, rainwater harvesting, and expanded wastewater reuse are suggested to alleviate pressure until the Shannon scheme, expected to deliver water around 2033, is operational. By 2044, 34% more water will be needed than is currently available.