EPA Ireland
Drinking-water monitoring results and the separate dataset of listed exceedances. The current place pages cover records from 2021 to 2025.
Official public data
Data Sources
The official public sources used to create WaterCheck Ireland place pages.
Official data sources
Each source provides a different part of a place report. WaterCheck Ireland brings them together without replacing the original records.
Uisce Éireann
Water Supply Zone names and geographic boundaries used to understand which supply zones overlap each town or city.
Census 2022
Official Built Up Area boundaries, settlement names and population figures for towns and cities.
How the sources work together
Census boundaries define the place, Uisce Éireann boundaries identify overlapping Water Supply Zones, and EPA records provide the historical monitoring information shown for those zones.
Monitoring applies to a whole Water Supply Zone and may include sampling locations outside the settlement. Population is provided as place context and is not used to estimate how many people receive water from a zone.
Different publication dates
The sources are published on different schedules. Census information is from 2022, the Water Supply Zone boundary snapshot is from 2026, and the current monitoring series covers 2021–2025.
A mapped zone may not have monitoring records for every year. Missing data is shown as unavailable rather than assumed to be zero.
Independent presentation
WaterCheck Ireland is independent of the EPA, Uisce Éireann and the Central Statistics Office. It presents their public datasets in a place-based format and does not create a new official rating or safety classification.