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Public consultation on proposed Castletroy Wastewater Treatment Plant upgrade

Uisce Éireann, working in partnership with Limerick City and County Council, is proposing an upgrade to the Castletroy Wastewater Treatment Plant (WWTP) to support existing and future population and economic growth.

Speaking about the public consultation, Seamus Glynn from Uisce Éireann said: 

"Castletroy Wastewater Treatment Plant has been providing wastewater treatment to the area since the early 1990's. It serves the East Limerick suburbs of Castletroy, Annacotty, Mountshannon and Castleconnell, as well as UL and local businesses. 

"The plant is currently operating at the upper limits of its capacity and Uisce Éireann has identified that an upgrade is required. The proposed upgrade will modernise the plant and increase the current capacity by over 70%. This will ensure we continue to preserve the lower River Shannon and support economic and population growth in East Limerick.

"From 1 June to 15 July we are looking for feedback from everyone in the community so that they can have their say. We welcome everyone's views, which will help to shape the development of this project and I would like to thank the local residents and businesses in advance, as we progress delivering this vital project.

The proposed upgrade at Castletroy WWTP will involve the construction of a new stormwater storage tank and a new primary sludge holding tank, installation of new primary treatment filters and lifting pump, and upgrades of the existing secondary treatment tanks and plant's sludge treatment facilities.

An online presentation, followed by a live questions and answers session with the project team, will be held at 19:00 on 13 June, 2022. If you would like to attend the online briefing, please email

If you would like to make a submission, please send it via email or post by Friday, 15 July, 2022.


Post: Castletroy Wastewater Treatment Plant Upgrade, JB Barry's & Partners Ltd, Classon House, Dundrum Business Park, Dublin 14

Uisce Éireann is responsible for the delivery of all public water and wastewater services in Ireland. We are committed to continuously upgrading and developing critical infrastructure to support the growth needed in housing and across our economy, while protecting the environment and safeguarding water supplies.

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