The practise of discharging raw sewage into Killala Bay will end within weeks.
Irish Water has confirmed it will commence operation of a new wastewater treatment plant in the coming weeks, which will stop the discharge of untreated wastewater into Killala Bay.
The new treatment plant in Killala will serve a population of 1,800 and will allow for social and economic growth, according to Irish Water.
This project forms part of a €19 million investment in wastewater infrastructure in Mayo, along with the completed Foxford and Charlestown schemes.
Irish Water is also progressing plans for a new wastewater treatment plant in Newport to address the remaining raw sewage being discharged in the county.