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The Water Supply (Water Quality) Regulations 2018

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PART 3Annual sampling frequencies: treatment works and supply points

Table 11

Annual sampling frequencies for Group A2 parameters: treatment works or supply points

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 at treatment works or supply points, those groups having been outlined in Part 1 of this Schedule. The frequencies are determined according to the volume of water supplied at each treatment works or supply point. The number of samples to be taken is the standard number specified in column 2, unless a notice varying this number has been issued under regulation 9.

Volume of water supplied m 3/dayStandard sampling frequency per year
<204
20-1,99952
2,000-5,999104
6,000-11,999208
≥12,000365

Table 12

Annual sampling frequencies for Group A3 parameters: treatment works or supply points

Volume of water supplied m 3/dayStandard sampling frequency per year
<202
20-9994
1,000-199912
2,000-5,99924
6,000-9,99936
10,000-15,99952
16,000-32,999104
33,000-49,999156
50,000-67,999208
68,000-84,999260
85,000-101,999312
102,000-119,999365
120,000-241,999730
242,000-484,9991,460
485,000-728,9992,190

Table 13

Annual sampling frequencies for Group B2 parameters: treatment works or supply points

Volume of water supplied m 3/dayStandard sampling frequency per year
<201
20-9994
1,000-49,9998
50,000-89,99912
90,000-299,99924
300,000-649,99936
≥650,00048

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