The Environmental Protection Agency (EPA) report Urban Waste Water Treatment in 2022, shows that Uisce Éireann has made progress in stopping discharges of raw sewage over the past year, with the connection of six villages to new treatment plants in 2022, it has been revealed.

However, wastewater continues to harm the quality of many of Ireland’s rivers, estuaries, lakes and coastal waters. While works to upgrade treatment plants and prevent pollution are progressing in some areas, Uisce Éireann’s delays in other areas are prolonging the risks to the environment and public health.

Dr Tom Ryan, EPA director said: “While it is encouraging to see continued progress in stopping the unacceptable practice of discharging raw sewage into our environment, waste water remains a significant pressure on Ireland’s water ways and is adversely impacting water quality. The pace at which Uisce Éireann is delivering improvements needs to accelerate to prevent pollution and protect water quality.

Prioritise resources

“Uisce Éireann must take the opportunity of its new investment plan for 2025 to 2029 to deliver waste water infrastructure that meets the needs of our society and protects and improves our environment into the future. The investment plan must prioritise resources to prevent pollution in the priority areas highlighted by the EPA.”

Thirty years after Ireland was required to bring provisions into force to comply with EU treatment standards set to protect the environment, less than half (45%) of wastewater is treated to these standards. This is expected to improve significantly to more than 90% when the upgrade of Ireland’s largest treatment plant at Ringsend in Dublin is complete.

Noel Byrne, EPA programme manager, said: “It is welcome that Uisce Éireann is currently building infrastructure at large urban areas, including Ringsend and Arklow, which are designed to treat wastewater to a high standard. However, poor management practices at upgraded plants, such as Skibbereen and Courtmacsherry, caused inadequately treated sewage to discharge into the environment.

"This is not acceptable as these plants have sufficient treatment capacity. Uisce Éireann must implement effective maintenance programmes for existing infrastructure and improve its operation and management of treatment plants to prevent such failures in future.”

The report is now available on the EPA website.