# The Private Water Supplies Regulations (Northern Ireland) 2017, Paragraph 4: Frequency of sampling


(1) Sampling for a Group B parameter must be undertaken at the frequencies specified in Table 4 for those parameters.
TABLE 4
Minimum frequency of sampling for Group B parameters
Volume m3 /day (calculated as averages taken over a calendar year)
Sampling frequency per year
≤ 1000
1
> 1000 ≤ 10,000
1 + 1 for each 3,300 m3/day of the total volume (rounding up to the nearest multiple of 3,300 m3/day)
> 10,000 ≤ 100,000
3 + 1 for each 10,000 m3/day of the total volume (rounding up to the nearest multiple of 10,000 m3/day)
> 100,000
10 + 1 for each 25,000 m3/day of the total volume (rounding up to the nearest multiple of 25,000 m3/day)

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Source: https://www.legislation.gov.uk/nisr/2017/211/schedule/3/paragraph/4 (the official version)
Page: https://openlegislation.uk/private-water-supplies-regulations-northern-ireland-2017/schedule-3/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.