EPA warns 55% of Irish wastewater plants failed standards in 2025
- 55% of Irish wastewater treatment plants failed EPA standards in 2025.
- Approximately half of all treatment failures were caused by poor operation and maintenance.
- Uisce Éireann has yet to start improvement works at 60% of 72 priority sites.
- Eleven towns and villages experienced daily raw sewage discharges during 2025.
- The European Commission has referred eight Irish urban areas to court over compliance failures.
The Environmental Protection Agency has issued a formal warning stating that Ireland’s environment is suffering due to the poor management of wastewater treatment plants by the national utility, Uisce Éireann. A report found that 55% of wastewater treatment plants failed to meet mandatory environmental standards in 2025.
This failure to comply with standards is causing ongoing harm to the natural environment. The EPA warned that the environment is being harmed by Uisce Éireann's poor management of wastewater treatment plants.
Infrastructure and maintenance failures persist
The Urban Wastewater Treatment in 2025 report found that approximately half of all plant failures resulted from deficient infrastructure. The remaining half of these failures were caused by poor operation and maintenance practices.
The EPA reported that the number of sites experiencing issues such as equipment breakdowns and inadequate training showed no significant improvement compared to 2024. Thirteen large urban centres across Cavan, Clare, Cork, Donegal, Dublin, and Louth failed to meet EU wastewater treatment standards in 2025.
Urgent action required at 72 priority areas
The EPA has identified 72 priority areas where urgent action is required to prevent pollution and protect the environment. EPA Programme Manager Noel Byrne stated that progress by Uisce Éireann at these sites is too slow, with work yet to start at approximately 60% of them.
Among these priority areas, 35 were specifically identified where wastewater discharges are adversely impacting water quality. Uisce Éireann has yet to start necessary improvements at 26 of these sites, which accounts for three-quarters of that specific group. The report also identified nine other areas where improvements were needed.
Raw sewage discharges continue in 11 locations
Despite progress in other areas, 11 towns and villages experienced daily raw sewage discharges in 2025, including Avoca in Co Wicklow.
Differing views on progress and investment
Significant upgrade works were completed at the Ringsend plant in Dublin by the end of 2025, which the EPA expects will lead to better performance in the 2026 report.
Despite these plant failures, Pat Byrne said that drinking water is "relatively well protected".
Impacts on water quality and protected habitats
The report identified nine areas requiring upgrades to protect freshwater pearl mussel habitats. Five areas need upgrades to protect waters designated for shellfish.
EU legal pressure regarding compliance
By 2025, the European Commission acknowledged progress at 20 of these locations. However, the commission referred the remaining eight areas back to the court to request financial sanctions.
Uisce Éireann operational background
Uisce Éireann, formerly known as Irish Water, operates as the national water utility. The government agency was founded in 2013 and maintains its headquarters in Dublin with a headcount of 2,294 employees.
The organisation provides water for growth programmes for the eastern region.
Frequently Asked Questions
- Poor wastewater management harming the environment - EPA (rte.ie)
- Poor wastewater management by Uisce Éireann harming environment, EPA finds (independent.ie)
- Uisce Éireann (tavily.com)
- United States Environmental Protection Agency (Wikipedia — background) (en.wikipedia.org)
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