Northern Ireland Water (NI Water) is a publicly owned water and sewerage utility entirely owned by the Northern Ireland government and regulated locally by the Northern Ireland Environment Agency. As a result of power-sharing agreements breaking down, important decisions about how to protect and restore the environment in Northern Ireland are just not being made. Consequently, there is currently no Environmental Performance Rating procedure in place for Northern Ireland Water.
Unlike privatised water companies in England and Wales, there is limited public data on sewage discharges or formal environmental fines for Northern Ireland Water. Transparency on storm overflow operation and discharge volumes is limited, with much of the monitoring infrastructure lacking automated reporting. Internal documents obtained in 2025 revealed that routine wastewater treatment compliance at NI Water facilities was significantly lower in unannounced inspections than in officially published, pre-announced tests. Investigators have surmised that this heavily indicates gaps in environmental performance and reporting accuracy, reinforcing the necessity for standardised testing and reporting across water companies.
Toxic algal blooms which are partly caused by consistent pollution are now impacting communities, businesses and crucailly the environment. In the UK’s largest lake, Lough Neagh, the influx of such blooms in 2025 highlights ongoing environmental pressures on Northern Ireland’s waterways and the need for improved wastewater performance and infrastructure.
Northern Ireland Water must prioritise greater transparency, real-time monitoring, and investment in wastewater infrastructure to build public confidence and protect waterways that are experiencing visible ecological stress due to nutrient pollution and sewage impacts.
Northern Ireland has a total of 2,398 operational sewage overflows, however, data for the operation of this infrastructure is sparse. Whilst Northern Ireland Water have provided a map of the locations of overflows they still provide no data on how often these overflows are discharging sewage, which they say is due to a lack of investment and budget for the provision of infrastructure to monitor sewage discharges.
All information regarding sewage assets (including condition and performance) is obtained through manual inspection, rather than automated systems as with other UK-based water companies. This means we have little to no information regarding the state of Northern Ireland’s water and the potential impact that sewage discharges are having on them. Not even Northern Ireland Water knows how much sewage they are dumping!
