Ahascragh Sewerage Scheme

Wastewater Project

Eliminating raw sewage into Bunowen / Ahascragh River

Currently over 300 wheelie bins of untreated wastewater is discharged to the Bunowen (Ahascragh) River per day. The level of treatment needs to be improved to ensure the water quality objectives of the Bunowen (Ahascragh) River are not compromised. There is also a storm water overflow in the village which operated during times of rainfall and discharges unscreened and untreated wastewater to the Mill Stream which is upstream of the drinking water abstraction point on the Bunowen (Ahascragh) River.

In Progress


  • Removal of the existing unscreened storm overflow and replacement with a new screened overflow and storm storage tank
  • Compliance with national and EU regulations relating to the treatment of urban wastewater
  • Provision for future development within the Ahascragh area


  • Upgrading of the existing wastewater treatment plant to provide secondary treatment that will serve a population equivalent of 470
  • Improvements to the storm water overflow which will involve works to ensure compliance under the relevant standards
  • Improvements to the existing main pumping station including pumps, mechanical plant and a storm water storage tank
  • Testing and commissioning of the works
  • This project is currently in the design and pre-planning stage

For further information you can contact the Project Team at GalwayUWW@water.ie.