Skip to main content


Uisce Éireann has set up a Public Awareness and Communications Programme for members of the public who would like to receive environmental information about discharges from Wastewater Treatment Plants licensed by the Environmental Protection Agency (EPA).

Uisce Éireann operates a network of wastewater treatment plants across Ireland with sole responsibility for cleaning and maintaining the public sewer network. These treatment plants vary in size due to the size and population of the area they serve.

Despite the size of a plant, the processes in treating wastewater are generally the same.

All Wastewater discharges (WWD) from areas served by Uisce Éireann sewer networks and discharging to the environment requires a wastewater discharge licence or certificate of authorisation from the EPA.

There are stringent conditions attached to wastewater discharge licences to ensure the treated effluent is of good quality and does not negatively impact on the environment.

To search for Wastewater Discharge Licences (WWDL), Certificate of Authorisations (COA), Annual Environmental Reports (AER’s), audit reports and associated application documentation relating to the WWDL, visit the EPA website.

Annual Environmental Reports (AERs)

Annual Environmental Reports (AERs) provide a concise summary of compliance information for the year being reported upon for Wastewater Discharge Licences. AERs are not required for the smaller Certificate of Authorisations. AERs for licensed agglomerations for 2018 and 2019 are available in this section. If you have a query about an AER you can contact Uisce Éireann using the form below.

Bathing water quality

For information on the bathing water quality of Ireland's beaches, visit

Receiving water quality

Receiving water is a stream, river, lake, sea or other surface or groundwater source into which treated or untreated wastewater is discharged. For information on receiving water quality, visit the EPA website.

To report a wastewater treatment plant issue or emergency, call our customer care helpline on 1800 278 278. Our lines are open 24/7.

If the flood is from a public sewer, polluting the environment, or posing any other health, safety or environmental risk contact us immediately.

Call 1800 278 278 / international +353 1 707 2828. Lines open 24/7.

If the leak is not an immediate risk, fill in the form below.

Please use this form if you wish to make a request for Compliance Monitoring Data (Influent, Effluent and ambient monitoring data).

Begin by selecting your county, then continue to complete all fields

Please note fields with an asterisk * are mandatory.

Building better services

From rural seaside towns to Ireland’s main cities, our projects are all working towards one end, to improve your water and wastewater services.