The Water Supply (Water Quality) Regulations (Northern Ireland) 2017

Number of samples

11.—(1) Subject to paragraphs (2) and (3) in each year a water undertaker must take, or cause to be taken—

(a) from its sampling points; or

(b) to the extent authorised by or under regulation 10 from its supply points,

the number of samples per year for analysis as regards residual disinfectant and each parameter listed in Table 2 in Schedule 3 or, as the case may be, Table 3 in that Schedule.

(2) Samples required to be taken by this regulation must be taken at regular intervals.

(3) In this regulation—

(a) in relation to sampling points, residual disinfectant or a parameter, and the supply of water to an estimated population within the range shown in Table 2 in Schedule 3, “the number of samples per year” means the number shown in that Table as applicable to that substance or parameter by reference to a population within that range;

(b) in relation to supply points, each of the parameters specified as items 7 and 12 to 30 in Table 3 in Schedule 3, and the supply of a volume of water within the range shown in column (3) of that Table, “the number of samples per year” means the number shown in column (4), of that Table as applicable to that parameter by reference to a volume supplied within that range; and

(c) where a particular supply point is in use for only part of a year, “the number of samples per year” means the number that bears to the number shown in column (4) of Table 3, the same proportion as the number of days in that year in which the supply point has been in use bears to 365.