# The Surface Waters (Abstraction for Drinking Water) (Classification) (Scotland) Regulations 1996, Regulation 6: Compliance with guideline values


(1) Subject to paragraphs (2) and (3) below, any waters classified under these Regulations shall be treated as complying with the limit specified in Schedule 2 for waters of the relevant class in relation to a parameter if–
(a) 90 per cent of the samples taken in relation to the waters in accordance with regulation 9 below comply with the standard;
(b) none of the samples fails the standard by more than 50 per cent;
(c) there is no danger to public health; and
(d) consecutive samples taken at statistically suitable intervals do not exceed the standard.
(2) Non-compliant samples shall be ignored for the purposes of paragraph (1) above if they are the result of a flood, natural disaster or abnormal weather conditions.
(3) Paragraph (1)(b) above shall not apply in the case of the limits specified in Schedule 2 in relation to temperature, pH, dissolved oxygen and microbiological parameters.

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Source: https://www.legislation.gov.uk/uksi/1996/3047/regulation/6 (the official version)
Page: https://openlegislation.uk/surface-waters-abstraction-for-drinking-water-classification-scotland-regulations-1996/regulation-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.