Shannon wastewater treatment plant upgrade

Wastewater Project

This €7.5 million project has increased capacity and ensures environmental compliance.

Irish Water, working in partnership with Clare County Council, has completed essential upgrades to the wastewater infrastructure in Shannon, Co. Clare. Ward and Burke Ltd delivered this project on behalf of Irish Water.

Phase 1 of the upgrade to the Shannon sewerage infrastructure was completed in 2017 and included the construction of a new inlet works, repairs to rising mains and upgrades to the pumping stations.

The next phase of upgrades to the WWTP commenced in 2020 which improved the wastewater treatment performance, increased the capacity at the plant and ensures compliance with the Wastewater Treatment Regulations.  

€7.5 million

What was involved as part of this project?

As part of the €7.5 million investment, Irish Water has:

  • Upgraded the Aeration Tanks, Blowers and Final Settling Tanks
  • Upgraded the Leachate and Sludge Pumping Stations
  • Upgraded the Instrumentation, Control and Automation processes
  • Provided a new Washwater Pump Station
  • Refurbished the sludge dewatering facilities
  • Installed new Ventilation and Odour Treatment systems

The upgrades made maximum use of the existing infrastructure on site, minimising the carbon footprint of the upgrade works.


  • Modernise and improve the performance of the wastewater treatment infrastructure in Shannon.
  • Ensure compliance with Urban Wastewater Treatment Regulations 2001.
  • Increase the treatment capacity of the plant.
  • Improve water quality in the River Shannon.
  • Provide for growth and development in Shannon and surrounding areas.