Sampling of private water supplies: further provision
32. As soon as a monitoring local authority has reasonable grounds for believing that any element, organism or substance, other than residual disinfectant or a parameter, whether alone or in combination with a parameter or any other element, micro-organism, parasite or substance, may cause a private water supply serving premises located in the area of that authority to be a supply which does not satisfy—
(a)the provisions of Part IV; or
(b)if a departure has been authorised under Part V in respect of a Type A supply, those provisions as read with the terms of that authorisation,
it shall take, or cause to be taken, sufficient samples from the private water supply in respect of that element, organism or substance, in order to establish whether the supply is wholesome.