The Water Supply (Water Quality) Regulations 2018

PART 2 Annual sampling frequencies: water supply zones

Table 8

Annual sampling frequencies for Group A4 parameters: water supply zones

Note:

This table and each table which follows it in this Part set out the annual sampling frequencies for all the substances and parameters comprising each of the groups to which they correspond, those groups having been outlined in Part 1 of this Schedule. These are determined for each water supply zone according to its estimated population (as specified in column one of each table in this Part). The number of samples to be taken is the standard number specified in column 2, unless a notice varying this number has been given under regulation 9.

Estimated population of water supply zone	Standard sampling frequency per year
<100	2
100-4,999	4
5,000—9,999	12
10,000-29,999	24
30,000-49,999	36
50,000-79,999	52
80,000-100,000	76

Table 9

Annual sampling frequencies for Group B1 parameters: water supply zones

Estimated population of water supply zone	Standard sampling frequency per year
<100	1
100-4,999	4
5,000-100,000	8

Table 10

Annual sampling frequencies for Group A1: water supply zones

Estimated population of water supply zone	Standard sampling frequency per year
<100	4
≥100	12 per 5,000 population

Note:

For the purposes of this Table, where the population is not an exact multiple of 5,000, the population figure must be rounded up to the nearest multiple of 5,000.