Untreated waste water released into Dublin Bay during storm
Treatment plant reached capacity limit due to heavy rainfall, says local politician
Indications of waste water discharges into Dublin’s River Liffey at Ringsend on Sunday
Storm water overflows were released untreated into Dublin Bay last weekend due to adverse weather conditions as a result of Storm Brian.
“This occurred as flows exceeded the available storage capacity in the [waste water] network,” an Irish Water spokeswoman added. “Both overflows are connected to warning signs on the beaches to alert water users that the overflows are in operation.
“The infrequent operation and dilute nature of the overflow does not impact on the water quality as the Irish Sea has adequate dilution given the volume of water.”
Members of the public also reported discharges into the Liffey from the nearby Poolbeg waste water treatment plant.
The incidents were arising because the waste water treatment plant had reached its capacity limit, he said, and needed to be expanded.
The problem was compounded by the Pembroke combined sewer, which extends from Rathmines and Ranelagh and discharges into the Swan River. This needed to be upgraded 20 years ago, he added, and was the cause of flooding during periods of high rainfall.
Treatment of waste water at the Poolbeg facility was found to be deficient by the Environmental Protection Agency in its latest report on sewage processing facilities.