# The Bathing Waters (Classification) Regulations 1991, Paragraph 2


Additional samples must be taken during that period if there are grounds to suspect that the quality of the waters is deteriorating for any reason or is likely to deteriorate as a result of any discharge.

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Source: https://www.legislation.gov.uk/uksi/1991/1597/schedule/2/paragraph/2 (the official version)
Page: https://openlegislation.uk/bathing-waters-classification-regulations-1991/schedule-2/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.