# The Private Water Supplies (Wales) Regulations 2017, Paragraph 5: Averaging

Extent: E+W

Where a parametric value in the radioactive substances parameters table is exceeded in relation to a particular sample taken by a local authority, the Welsh Ministers must specify, by notice in writing to the local authority, the extent of resampling necessary to ensure that the measured values are representative of an average activity concentration for a full year.

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Source: https://www.legislation.gov.uk/wsi/2017/1041/schedule/3/paragraph/5 (the official version)
Page: https://openlegislation.uk/private-water-supplies-wales-regulations-2017/schedule-3/paragraph-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.