Castletownshend Sewerage Scheme

Wastewater Project

Irish Water has commenced construction on a new wastewater treatment plant for Castletownshend

Uisce Éireann, working in partnership with Cork County Council, has commenced works for the Castletownshend Sewerage Scheme in Co. Cork. This project involves the construction of a new wastewater treatment plant (WWTP) and sewerage infrastructure.

This project will eliminate the discharge of untreated wastewater from the Castletownshend into Castlehaven Harbour. The new WWTP will serve a population equivalent of 531. Glan Agua has been appointed as the contractor to deliver the works.

In Progress


The new wastewater treatment plant will bring benefits to Castletownshend including:

  • Improved water quality in Castlehaven Harbour.
  • Protection of recreational waters for swimming, rowing, sailing and sightseeing.
  • Better health and integrity of the environment.
  • Cleaner water will enhance local amenities and a platform for social and economic development.
  • New wastewater treatment plant, sewer pipes and pumping stations sized to accommodate future population growth.
  • Ensure compliance with national and EU regulations relating to the treatment of wastewater. 


  • A new wastewater treatment plant in the north-east of the town, which will serve a population equivalent of 531.
  • Construction of a new pumping station.
  • Upgrading of the existing main street sewer network.
  • 500m of new pipes to separate storm water from wastewater.
  • 325m new gravity pipe to bring untreated wastewater to the WWTP.
  • Conversion and extension of existing outfall into new storm water overflow at the quays.
  • Construction of new and separate 290m outfall from WWTP.
  • The works are due to commence in late July/early August and complete in Q1 2024.

What are the next steps?

Works are due to commence in August 2022. The project is due for completion in early 2024 with the majority of construction works completed by mid 2023.

How can I connect into the new sewerage scheme?

Any person or business wishing to get a new connection to public wastewater collection infrastructure must contact Uisce Éireann. You can make a pre-connection enquiry in order to establish whether a connection to the public network is feasible, where the connection can be made and any associated charges. For more information, please visit the Connections section of our website.

Who should I contact if I require more information?

For further information, you can contact:

We’re working to eliminate raw sewage discharges in Ireland

  • Work is now complete in 18 areas around the country where there was no sewage treatment before. 60% of raw sewage is now being treated for the equivalent of 100,000 people.
  • This year we have 15 locations under construction across the country, prioritising the areas where it can make the biggest impacts first.
  • We are on track to eliminate the majority of raw sewage discharges by the end of 2025, with a total investment of €700 million.
  • In Cork, works in Castletownbere, Inchigeelagh and Whitegate-Aghada are underway; and works planned for Ballycotton and are due to commence this year, 2022.