Drinking Water Quality

The EPA Drinking Water Report for Public Water Supplies 2019 provides an overview of drinking water quality in Ireland for 2019, based on monitoring data from Irish Water, and the regulation of public supplies by the EPA.

The EPA Focus on Private Water Supplies 2019 report provides an overview of the quality of private drinking water supplies in Ireland for 2019, based on monitoring data from local authorities.

Priority Actions

The EPA has identified the most important issues which should be addressed on a national level to protect and improve public drinking water supplies. Recommendations have been made by the EPA to Irish Water to address these issues and work is progressing.

Priority IssuesRequired Actions
Ensure all water treatment plants are effective Irish Water must deliver works for all Remedial Action List schemes on time and set concrete dates for supplies on the list without completion dates.
Keeping water free of harmful bacteria (disinfection) Irish Water must put in place robust disinfection systems via the National Disinfection Programme to prevent long-term Boil Water Notices.
Minimising harmful disinfection by-products (trihalomethanes) Irish Water must put in place treatment that adequately removes organic matter from source water before it is chlorinated, to prevent chronic trihalomethanes issues.
Eliminate lead from our water


Irish Water should increase the rate of lead connection replacement to ensure removal of all public side lead. Public buildings must be assessed for lead plumbing and addressed where it is found. Homeowners should be strongly encouraged to replace private side lead pipework under the National Lead Strategy. 
Prevent pesticides from entering our waters All stakeholders should promote responsible use of pesticides with a focus on drinking water source catchments. Irish Water must treat water where catchment action is ineffective.
Manage risks to our public water supplies Irish Water must progress Drinking Water Safety Plans for all public water supplies so that the largest risks are known and can be addressed as a priority. 

Owners of private wells should ensure that they are designed, located, installed and maintained properly. Wells should be tested regularly, particularly after a prolonged period of heavy rainfall, since this is when the well may be overwhelmed and contaminated.

Find out more

Find drinking water quality results in your water supply zone on Irish Water's website

Download drinking water data