Leixlip Water Treatment Plant Upgrades


Irish Water is investing over €12 million to reduce the risk of any future boil water notices and safeguard drinking water to 600,000 people in the Greater Dublin Area.

Irish Water, working in partnership with Fingal County Council, is progressing with works to upgrade the Leixlip Water Treatment Plant (WTP). This investment will benefit over 600,000 people across the Greater Dublin Area (GDA) through an improved water supply. Glan Agua Limited is delivering these works on behalf of Irish Water.

In Progress
€12 million


The upgrade works carried out as part of this project will:

  • Improve drinking water quality.
  • Ensure the delivery of safe drinking water to residents and businesses in the Greater Dublin Area.
  • Significantly reduce the risk of any future boil water notices (BWN).
  • Improve security of the drinking water supply.
  • Improve control and monitoring of the plant processes.
  • Ensure compliance with current drinking water regulations.


  • Upgrading the filtration system at the plant which comprised the full rebuild and upgrade of 12 rapid gravity filters at the plant.
  • The installation of an ultraviolet (UV) disinfection system process at the plant to mitigate against risk of various contaminants. This installation commenced in Q1 2020 and is currently ongoing.  
  • Upgrading of the existing on-site electro-chlorination disinfection system including construction of a new back-up system and other refurbishment works.
  • Cleaning, repairing and upgrading of the existing Clearwater tank. 
  • The installation of new turbidity, flow and UVT monitoring system at the plant.
  • Upgraded the control and monitoring systems to improve the performance of the plant.