# The Water Supply (Water Quality) Regulations 2016, Paragraph 3: Screening strategies for gross alpha activity and gross beta activity


(1) A water undertaker may use a screening strategy for gross alpha and gross beta to monitor for the parametric indicator value for indicative dose.
(2) Subject to paragraph (3), the recommended screening values are—
(a) 0.1Bq/l for gross alpha activity;
(b) 1.0Bq/l for gross beta activity .
(3) If the gross alpha activity exceeds 0.1Bq/l or the gross beta activity exceeds 1.0Bq/l, analysis for specific radionuclides is required.
(4) The Secretary of State may set alternative screening levels for gross alpha activity and gross beta activity where it can be demonstrated by the water undertaker that the alternative levels are in compliance with an ID of 0.1 mSv.
(5) The radionuclides to be measured must be based on all relevant information about likely sources of radioactivity.

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Source: https://www.legislation.gov.uk/uksi/2016/614/schedule/4/paragraph/3 (the official version)
Page: https://openlegislation.uk/water-supply-water-quality-regulations-2016/schedule-4/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.