As Galway News reports, locals in the Claddagh area spotted a discharge of raw sewage into the Claddagh Basin in July, which was confirmed by City Councillor Catherine Connolly to be an outfall.
Such releases are triggered automatically, like a safety valve, in emergency circumstances, such as after heavy rainfall which backs up the system.
Cllr Connolly has expressed her concern over an increase in the number of such releases over recent months, and their potential contribution to the degradation of water quality in the area - especially following the temporary closure of Grattan Beach in Salthill last month due to E.coli contamination.
She has also called for a report from the council on the difficulties experiences at the Mutton Island water treatment plant resulting from the inflow of grease and fats into the system from hotels and restaurants.
Galway News has more on the story HERE.