European Union (Radioactive Substances in Drinking Water) Regulations 2016 (S.I. No. 160 of 2016).

These Regulations lay down requirements for the protection of health of the general public with regard to radioactive substances in drinking water. They include requirements regarding monitoring for radioactive substances in drinking water and make provision for remedial action and public information procedures. A water supplier shall ensure that water intended for human consumption shall be monitored to assess compliance with the parametric values laid down in Part 1 of the Schedule to these Regulations. Irish Water shall be responsible for monitoring public water supplies for radioactive substances in accordance with the monitoring principles and frequencies set out in Part 2 of the Schedule. Each local authority shall monitor compliance of water intended for human consumption supplied in its functional area by any supplier other than Irish Water. The Environmental Protection Agency may issue guidelines in relation to the nature and timing of remedial, enforcement or other relevant action under this Regulation and Irish Water and local authorities shall take such guidelines fully into account when fulfilling their obligations regrading protection of public health and remedial action. Remedial action may also be undertaken by a supervisory authority.