That's a worst-case scenario for a proposed pipeline from the river Shannon, through Kildare and on to the capital.
A project to secure the water supply for Kildare and the Greater Dublin Area could hit 10 billion euro.
That's a worst-case scenario for a proposed pipeline from the river Shannon to the capital.
A risk analysis has estimated the infrastructure could cost anything from €3.3 billion euro to a worst-case scenario of €10.4 billion euro.
A public consultation on the scheme, that will have capacity to support water supply needs for up to half of the population, is currently underway in Kildare.

The 170 kilometre pipe will bring treated water from the Parteen Basin in Tipperary to Peamount in Dublin.
The infrastructure will connect to the Greater Dublin Area’s water network and create a supply spine serving communities along the route, ensuring resilience for Kildare, Dublin, Meath, and Wicklow.
In Kildare, public consultation events will take place at the Hamlet Court Hotel, Johnstownbridge, on January 28, and the Glenroyal Hotel, Maynooth, on January 29, from 4–8 p.m.
The consultation period runs until March 4, 2025, with additional events in Tipperary, Offaly, and online.
Tipperary farmer Liam Minehan, from the Fight the Pipe campaign, says leaking pipes in the capital should be fixed instead.
But Maria O'Dwyer, from Uisce Eireann, says while they're tackling leakages - it's not enough.

Kfm Obituary Announcements (Saturday)
Sharp Rise In M9 Collisions With Garda Call-Outs Up Year-On-Year
Councillor Seeks Clarity On How Often Nightclubs and Late Bars In Naas Are Inspected For Fire Risks
Unpaid Eight-Month Work And Training Placement For Adults With Disabilities Branded "Extremely Unfair"
Department Of Education Defends Kildare SNA Cuts Amid Claims Of Reduced Need At Some Schools
Naas Nurses Threaten Escalation As Staffing Row Deepens
Driving Tests Face Disruption As RSA Testers To Strike Next Week