Irish Water is aware of a sewage overflow into the Nanniken river in St Anne's Park.

Irish Water is aware of a sewage overflow into the Nanniken river in St Anne's Park. Irish Water in partnership with Dublin City Council is carrying out investigations into the cause of the overflow.

Suspected blockage

A blockage suspected to be located in a syphon under the river is the likely cause of this overflow. The removal of this blockage is complex given its location and crews are onsite working to unblock the syphon as quickly and as safely as possible. It will be necessary to empty an underground sewage tank so that crews can access the blockage in order to remove it. The health and safety of the crews involved in this work is paramount.

The pond in St. Anne's Park receives flow from the River Nanniken. The inlet to this pond was protected from further flow entering. Signs informing the public of this incident are being erected in the park by Dublin City Council. The Environmental Protection Agency, Inland Fisheries Ireland and other stakeholders have been notified of the incident. Irish Water and Dublin City Council regret any inconvenience caused to the users of St Anne’s Park as a result of this incident.


This blockage and subsequent overflow serves as a reminder of the issues caused by flushing items like wet wipes down the toilet and pouring fats, oils and greases down the kitchen sink. Every day people flush thousands of sanitary items such as wet wipes and cotton bud sticks down the toilet instead of simply putting them in the bin. These blockages cause overflows impacting the environment just like this one.

Think before you flush

We would like to remind the public to "Think Before You Flush" and to only flush the 3 Ps (Pee, Poo and Paper). When the 3 Ps (Pee Poo & Paper) are flushed down the toilet they travel along the sewer network to our wastewater treatment plants, where they are treated and the effluent is returned safely to our rivers and seas. “Think Before You Flush” is a public awareness campaign about the problems sanitary products and other items can cause in our marine environment and our wastewater network when they are flushed down the toilet. The campaign is operated by Clean Coasts in partnership with Irish Water.

A further update will be provided as soon as it is available.



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