Requirement to carry out a risk assessment
6.—(1) A local authority must carry out a risk assessment within five years of the coming into force of these Regulations, and subsequently every five years (or earlier if deemed necessary or it considers that the existing risk assessment is inadequate) of each private supply that supplies water to any premises in its area (other than a supply to a single dwelling not used for any commercial activity).
(2) It must also carry out a risk assessment of a private supply to a single dwelling in its area not used for any commercial activity if requested to do so by the owner or occupier of that dwelling.
(3) The risk assessment must establish whether there is a significant risk of supplying water that would constitute a potential danger to human health.