# The Private Water Supplies (England) Regulations 2016, Paragraph 6: Screening for certain radionuclides, or screening for an individual radionuclide

Extent: E+W+S+N.I.

(1) If one of the activity concentrations exceeds 20% of the corresponding derived value or the tritium concentration exceeds its parametric value specified in the radioactive parameters table, an analysis of additional radionuclides is required.
(2) A local authority must take into account, in deciding which radionuclides are required to be measured for each supply, all relevant information about likely sources of radioactivity.

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Source: https://www.legislation.gov.uk/uksi/2016/618/schedule/3/paragraph/6 (the official version)
Page: https://openlegislation.uk/private-water-supplies-england-regulations-2016/schedule-3/paragraph-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.