Northern Ireland Institutions Dail Éireann — 2023-04-27 ============================================================ Darragh O'Brien (FF), Dublin Fingal The Water Services Act 2007 , as amended, requires all owners of premises served by an individual domestic waste water treatment system to register their system with the relevant local authority. Further details are available at the following link: www.protectourwater.ie/default.aspx. I can confirm that my Department does not compile the requested data. In relation to the Census 2016 information requested, Census data, including the number of households that recorded having a septic tank, can be accessed on the CSO website, at the following link data.cso.ie/table/EY044 --- Source: Houses of the Oireachtas. Licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). The Official Report is revised after first publication; the fetch timestamp below identifies the version quoted. Record URI: https://data.oireachtas.ie/akn/ie/debateRecord/dail/2023-04-27/debate/main Retrieved: 2026-08-14T04:51:49+00:00 Sitting date: 2023-04-27