River Delvin protected as Stamullen plant is closed

Stamullen’s old wastewater treatment plant has officially been decommissioned, with all sewage from the village now being pumped to Balbriggan for treatment.

The new network also includes capacity for future wastewater from the nearby village of Gormanston.

The multi-million euro upgrade, recently completed by Uisce Éireann, saw the construction of a modern pumping station in Stamullen and the installation of six kilometres of twin rising mains connecting the village to the Balbriggan sewer network at Cardy Rock.

The change will significantly improve local water quality, as treated wastewater is no longer being discharged into the River Delvin.

Uisce Éireann says the new system will support expected population and housing growth while delivering lasting environmental benefits.

“This project not only provides the infrastructure needed to support future housing and population growth, but also delivers real environmental benefits by removing the discharge of treated wastewater to the River Delvin,” said Conor Delaney of Uisce Éireann.

“We are delighted to have delivered this upgrade for the community, helping to protect local water quality while ensuring Stamullen has the water services it needs to thrive.”

Construction was carried out by David Walsh Civil Engineering Ltd. The works form part of a wider push to modernise wastewater infrastructure in growing commuter towns around Dublin.

Uisce Éireann, the national utility responsible for drinking water and wastewater treatment, says it remains committed to investing in long-term infrastructure that enables sustainable development across the country.