Water Supply (Water Quality) Regulations (Northern Ireland) 2017 (S.R. No. 212 of 2017).

These Regulations prescribe new rules relative to the quality of water supply services. They are primarily concerned with the quality of water supplied in Northern Ireland by the water undertaker for drinking, washing, cooking and food preparation, and for food production, and with arrangements for the publication of information about water quality. The Regulations require the water undertaker to identify annually the areas ( water supply zones ) that are to be relevant for a particular year for the purposes of the application of provisions of the Regulations. A water supply zone may not comprise an area in which the estimated population exceeds 100,000. They also, among other things, prescribe standards of wholesomeness in respect of water that is supplied by the water undertaker for cooking, provide for the monitoring (sampling) of water supplies, investigate the cause of any failure, or apprehended failure, of any parameters set out in Schedule 1 or any indicator parameters set out in Schedule 2 and for a notification to be made to the Department, deal with the treatment of water and regulates the substances, processes and products that may be used by the water undertaker in connection with the supply of water, and deal with the provision of information by the water undertaker.