Naas Wastewater Upgrade

Wastewater Project

Irish Water has upgraded the wastewater infrastructure in Naas to reduce overflows into the River Liffey.

Irish Water is upgrading the wastewater infrastructure in Naas as part of the Upper Liffey Valley Sewerage Scheme Sallins, Clane, Newbridge and Kill are served by a wastewater network which is no longer fit for purpose. This can cause overflows and flooding during storms. Irish Water is investing over €38 million to solve the problem and to provide additional capacity for future growth in these towns. Coffey Construction Limited is working on behalf of Irish Water to deliver these works.

Irish Water is working proactively with our delivery partners and as part of a multi-agency working group to ensure that our construction works are carried out in a controlled and safe manner, in keeping with Government and HSE guidelines to protect workers, their families and the broader community.

€38 million

What is happening in Naas?

  • Irish Water, working in partnership with Kildare County Council, has upgraded and replaced the sewers in several locations in Naas. To minimise disruption, the work was completed in phases and traffic management was in place. Irish Water would like to thank residents and businesses for their patience and coordination during the works.

Works Update

Pipeline works in Naas are now complete. Works were carried out at the following locations:

  • Phase 1: Devoy Road, Newbridge & Pacelli Road (complete)
  • Phase 2: John Devoy Road (complete)
  • Phase 3: R445 Newbridge Road (complete)
  • Phase 4: R445 Newbridge Road (complete)
  • Phase 5: (R409) Jigginstown (R445) Newbridge Road (complete)
  • Phase 6: St Martin’s Ave & Pacelli Road (complete)
  • Phase 7: Sarto Road & Pacelli Road (complete)

Permanent reinstatement will be carried out in these areas in 2021.


  • The sewer network will have more capacity, which will facilitate future growth and economic development
  • Treated wastewater will be cleaner and will meet all regulatory requirements, which will help Ireland avoid substantial EU penalties
  • The number of emergency overflows to the River Liffey will be significantly reduced
  • There will be a reduced risk of flooding in Naas.