Regulation 13 Monitoring – general provisions
A local authority shall–
determine the times of the year and of the day when samples of water from a private supply are to be taken;
if a private supply serves a number of premises, select at random the premises at which samples are to be taken,
so as to ensure that, so far as is reasonably practicable, analysis of the samples will produce data which is representative of the quality of water from that supply.
Samples are to be taken–
in relation to premises supplied with water for food production purposes, from a point immediately before the point where the supply is so used;
in relation to all other premises, at a tap used for supplying water for drinking or cooking.
Where a local authority is required under the provisions of Schedule 3 or 4 to take more than one sample within a specified period, the samples shall be taken at regular intervals.
A local authority shall, in accordance with paragraph (5), take and analyse a sample of water from any supply to which regulation 11 applies as soon as it becomes aware of its use or proposed use.
The sample of water to be taken by virtue of paragraph (4) shall be in addition to any other sample required by these Regulations and shall be analysed for compliance with the prescribed concentrations or values for–
in the case of a class A, B, 1 or 2 supply, all the parameters listed in column (1) of Schedule 3;
in the case of a class C, D, E, 3, 4 or 5 supply, the parameters listed in column (1) of Part II of Schedule 4.
It shall be the duty of a local authority to take samples of water from private supplies of classes C, D, E, 3, 4 and 5 serving premises in their area from time to time to ascertain and record the extent to which any pesticides and related products are present in those supplies.
A local authority shall, at the request of a person who is a relevant person in relation to a private supply serving premises in its area, take and analyse a sample from the supply for compliance of the parameters specified by that person with the prescribed concentrations or values for those parameters.