Regulation 10 Additional sampling

As soon as Scottish Water has reasonable grounds for believing that any element, organism or substance (other than residual disinfectant or a parameter in Table A, Table B or Table C), whether alone or in combination with any other such parameter or any other element, organism or substance, may cause the supply within a water supply zone to be a supply which does not satisfy the requirements of Part 3, it must take, or cause to be taken, sufficient samples from water within that zone (whether from a service reservoir, a treatment works or otherwise) in respect of that element, organism or substance to establish whether that water is wholesome.