The wastewater infrastructure in Omeath, Co Louth, is set to be upgraded, Irish Water has confirmed.
The works are intended to "to end the unacceptable practice of discharging untreated raw sewage to Carlingford Lough," the national water utility said in a statement.
Irish Water is working in partnership with Louth City Council to construct a new wastewater treatment plant to serve a population equivalent of 1,600 and a new network pump station with emergency storage.
The project will also include the installation of new sewer pipelines and the upgrade and extension of the existing outfall pipe.
Once completed, benefits to the region will include the "protection of recreational swimming, fishing, kayaking and sightseeing waters; and safeguarding human and environmental health".
Works are due to commence on site in the coming weeks.