North City Arterial Main (NCAM)
Water Supply Project
Uisce Éireann is progressing works to install a strategic trunkmain servicing the northern area of Dublin City.
Uisce Éireann is installing 5.5km of strategic trunkmain in the Clontarf area of Dublin City and neighbouring Fingal area as part of the North City Arterial Main (NCAM) project.
Once complete, the NCAM will be a critical piece of infrastructure for cross city water transfers between reservoirs in Ballymore Eustace and Leixlip.
This project will involve the construction of two separate trunkmains at the following locations:
- James Larkin Road/Dublin Road between Causeway Road and Bayside Boulevard South Junction, including Greendale Road and Thornville Road
- Clontarf Promenade between Hollybrook Road and The Woodenbridge
These new trunkmains will be connected with existing mains between Fairview Park and Hollybrook Road and the Woodenbridge and Causeway Road to complete the NCAM scheme.
This project is part of Water for Growth, a major investment programme for the Eastern Region. With an initial investment of over €500 million, it brings together 30 coordinated projects to be delivered over the next 10 years, focused on strengthening the existing water supply network and supporting the region’s continued growth.
North City Arterial Main (NCAM) - Proposed Pipeline Route
Why is this project needed?
This project is critical to ensuring a secure and reliable drinking water supply to homes and businesses in North Dublin. It is a key project to help realise Government’s proposed target of 300,000 homes by 2030.
When complete, this project will support social and economic growth in North Dublin City.
- Enable the delivery of 12,000 new homes in the North Dublin area.
- Reduce interruption to supply to 160,000 properties.
- Improve pressure and resilience to 29,000 existing homes between Clontarf and Howth Head.
- Protect old/brittle mains in Clontarf/Donnycarney.
Completion of the North City Arterial Main Scheme will link supplies at Leixlip and Ballymore Eustace Water Treatment Plants for customers in North Dublin, providing greater resilience and security of supply.
What is happening next?
Upcoming works (as of September 2026):
Greendale Road and Thornville Road:
- Pipelaying works are progressing well on Thornville Road and will be completed by the end of September.
- Traffic moving under a stop/go traffic management system.
- Permanent reinstatement works will be completed at a later date and the local community will be notified in advance.
James Larkin Road/Howth Road/Greendale Road junction:
- Pipe installation works are progressing at the James Larkin Road/Howth Road/Greendale Road junction.
- Works will continue north on Howth Road/Dublin Road to Bayside Boulevard for approximately 6 months.
- Standard working hours are 8.00am to 7.00pm Monday to Friday with weekend works as required.
Kilbarrack Road (from Thornville Road/Kilbarrack Road junction to Kilbarrack Parade junction):
Weekend works will be required over the coming weeks. Further information will be provided in due course.
Pipeline installation works are progressing and planned at a number of locations over the coming months
James Larkin Road:
- Footpath resurfacing works will commence from Monday, 21 September 2026 and expected to continue until late November.
- A Stop/Go traffic management system is necessary to establish a safe, protected working zone for site personnel and to facilitate safe movement of pedestrians and motorists. While these temporary traffic controls may result in some inconvenience, safeguarding both our workforce and the public remains our highest priority.
- To minimise the impact on traffic and commuters, working hours will be 10:00am to 4:00pm.
- Outside of working hours, traffic will resume to two-way operation.
Access for residents, property holders and emergency services will be facilitated throughout the works.
Please note that programme dates and work schedules may change from time to time due to operational requirements, ground conditions, weather or other unforeseen circumstances. While this may occasionally result in amendments to previously communicated timelines, we will do our utmost to keep the local community informed of any changes wherever possible.
Uisce Éireann is actively engaging with key stakeholders and the local community and will continue to do so throughout the project. GMC Utilities Group has a dedicated Community Liaison Officer (CLO) who can be contacted on 085 8541594.
We would like to thank the local community, for their patience and ongoing support while we continue to deliver water services for Ireland for the benefit of current and future generations.
Works on the Clontarf Promenade between Hollybrook Road and The Woodenbridge are expected to commence in 2027.
Details of any planned supply interruptions associated with this project will be updated on the Water Supply Updates section of our website and stakeholders affected will get advance notice.
