Drinking water quality results
Summary of the results for your Water Supply Zone (WSZ)
What your results mean
These explanations will help you understand the results in our water quality reports.
Parameters
Parameters are what we look for and measure when we test water samples. The levels of parameters we find can affect the quality of your drinking water.
The European Union Drinking Water Regulations S.I. No. 99/2023
- the drinking water parameters we must test for
- how often we must test for them
- the acceptable limits for each parameter
Exceedances
When a water sample contains higher levels of a parameter than the regulations allow, it's called an exceedance. When this happens, Uisce Éireann carries out a risk assessment. If there is a risk to public health, we consult with the Health Service Executive (HSE). Together we agree the next steps, which may include telling the public.
Learn more about how we test drinking water
Remedial action list
This is a list of public drinking water supplies considered 'at risk' regarding water quality. If a supply is on the list, it means the water treatment process for that supply and/or how it is managed may have issues that Uisce Éireann needs to resolve.
The remedial action list is published by the Environmental Protection Agency (EPA) and updated every 6 months. Uisce Éireann must give an action plan to the EPA for each supply on the list. We have prioritised these water supplies for investment.
