Upper Liffey Valley Sewerage Scheme

Wastewater Project

Irish Water is expanding and upgrading the sewerage system in communities across Kildare.

Wastewater from the area is sent to a wastewater treatment plant at Osberstown for treatment. The Osberstown plant has already been upgraded to increase capacity, and to ensure that wastewater is treated to meet the requirements of European regulations.

We are now working on the next stage of the scheme, upgrading the sewer network. These upgrades will ensure the network has enough capacity for future growth, and will reduce the risk of overflows during storms. We are working in several locations across Kildare, including Sallins, Clane, Prosperous, Naas, Johnstown, Kill, Newbridge, Kilcullen, Athgarvan, Carragh and the Curragh.

In Progress


  • 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


  • Significant upgrades to the Osberstown wastewater treatment plant (now complete).

  • 28Km of new gravity sewers and rising mains to reinforce and improve the existing network.

  • 6 new or upgraded pumping stations, all with stormwater storage tanks to reduce the risk of emergency overflows.

What is happening now?

Naas and Newbridge:

Irish Water are delighted to announce that works on the Monread Road, Naas, and Standhouse Road, Newbridge, have been completed ahead of schedule. Both roads are now fully re-opened. We would like to thank all businesses and residents for their cooperation during these essential works.

Permanent reinstatement works will be carried out at both locations over the coming months. We will endeavour to keep you updated ahead of this.


Permanent reinstatement works will take place along the Celbridge Road (R403), through to the Ballinagappa Road (L1023), Prosperous Road (R403), Sallins Road (R407) & Churchfield/Central Park Estate. It is planned that these works will start on Monday, 9 August and last for approximately 4 weeks.

To facilitate these works road closures will be required. While no through traffic is possible during these necessary works, pedestrian access will be maintained at all times during the works and local access via selected routes will be maintained for deliveries and customers. In order to complete the works safely, we would appreciate if vehicles could park on private property for the duration of the works. We thank you for your co-operation apologise for any inconvenience this may cause.

Please note that the dates are indicative & are subject to change. For further information regarding the works please contact the project team on 086 387 7875 or visit the dedicated project page on our website.

Indicative Commencement DatesLocation

9 - 13 August

Abbey Court Housing Estate
Day works: 8:00am - 7:00pm

16 August - 10 September

Central Park/Churchfield Esate
Day works: 8:00am - 7:00pm

16 - 19 August

Prosperous Road
Road Closure Day works: 8:00am - 7:00pm

20 - 21 August

Ballinagappa Road
Road Closure Day works: 8:00am - 7:00pm

23 August

Main Street 3

Stop/Go Nights: 7:00pm - 7:00am
24 August

Main Street 2

Shuttle System Nights: 7:00pm - 7:00am
25 August

Main Street 1

Road Closure Nights 7.00pm- 7.00am
26 - 27 August Circle K Junction
Road Closure Nights 7:00pm - 7:00am

Stakeholder Engagement

Irish Water are continuing to engage with residents and businesses in the local area in order to minimise disruption. Our community liaison officer is available to take any queries on 086 387 7875.

What is happening in Clane?

For more information on these works, please visit our Clane project page.

What is happening in Newbridge?

For more information on these works, please visit our Newbridge project page.

What is happening in Naas?

For more information on these works, please visit our Naas project page.