# The Private Water Supplies (Wales) Regulations 2017, Paragraph 8: Screening for certain radionuclides, or screening for an individual radionuclide

Extent: E+W

If one of the activity concentrations exceeds 20% of the corresponding derived value or the tritium concentration exceeds its parametric value listed in Part 3 of Schedule 1 an analysis of additional radionuclides is required.

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Source: https://www.legislation.gov.uk/wsi/2017/1041/schedule/4/paragraph/8 (the official version)
Page: https://openlegislation.uk/private-water-supplies-wales-regulations-2017/schedule-4/paragraph-8
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.