In 2005, the Greater Dublin Strategic Drainage Study (GDSDS) concluded that all existing wastewater treatment plants in greater Dublin should be upgraded to reach their maximum capacities. It also highlighted the need for a new regional wastewater treatment facility in Dublin. As a next step, these results were used as a basis for the Strategic Environmental Assessment in 2008, which recommended that the site of a new wastewater treatment plant, outfall, and the routes of new sewers should be identified following a rigorous Alternative Site Assessment (ASA) process.

A four-stage process was therefore employed which involved extensive public engagement, as detailed below and outlined in the leaflet GDD Project Consultation.

Four focused periods of non-statutory public consultation were undertaken to inform the project, as follows:

1st Consultation May – June 2011
Study Area Constraints

2nd Consultation Oct – Dec 2011
Shortlist of 9 Land Parcels, Pipeline Corridors & Marine Outfall

3rd Consultation May – July 2012
Three Emerging Preferred Site Options

4th Consultation June – Aug 2013
Preferred Option announced and feedback sought on issues to be considered in the EIS

Overview of Public Engagment to Date

Over 30,000 people have engaged with the GDD Project Team since 2011, at open days, meetings, on the information telephone line and email service and by making written submissions.

Phase No. of media articles No. of Open days No. of attendees No. of submissions
1st Consultation





2nd Consultation





3rd Consultation





4th Consultation










Details of each period of focused public consultation, and the feedback received, was published in dedicated reports.  Responses to issues raised in the first, second and third public consultations were addressed in the technical reports published to date.  All of these reports are available for view / download here.

Issues raised in the fourth consultation will be addressed in the EIS that will form part of the planning application to An Bord Pleanála in 2018.

During the environmental assessment period from 2014 – 2017, the GDD project team has continued to adopt a proactive approach to ongoing public and stakeholder engagement by issuing regular project progress updates to news subscribers, holding public information events locally, study tours to other wastewater facilities, and through briefing a wide range of stakeholders including community groups, businesses, prescribed bodies, state agencies, local authorities, public representatives and media.

Public information events have been held regularly in civic offices, community centres and shopping centres throughout the environmental assessment period. Information events were held locally ahead of the marine ground investigations in summer 2015. The communications team has also produced a GDD project overview video which is available on the homepage.

Irish Water is committed to ongoing engagement with all relevant and interested stakeholders and the project team continues to welcome questions, comments or observations so please continue to Contact Us.


Upcoming Public Information Events

Prior to submitting a planning application, the Project Team will be holding three public information events on the development of this vital regional project which will serve the equivalent of half a million people into the future. The events will be held as follows:

  • Tuesday, 21st November 2017 – Portmarnock Hotel and Golf Links from 2-8pm
  • Monday, 27th November 2017 – National Sports Campus Conference Centre in Abbotstown from 2-8pm
  • Wednesday, 29th November 2017 – Hilton Hotel, Northern Cross in Clonshagh (Clonshaugh) from 2-8pm

You are welcome to come along and find out more about the Greater Dublin Drainage Project.