# The Public Water Supplies (Scotland) Regulations 2014, Paragraph 2


Subject to paragraph 1, sampling at the point of compliance must meet the following requirements:—
(a) a sample for copper, lead or nickel must be taken at the consumer’s tap without prior flushing;
(b) a sample for any such parameter or any other chemical parameter must—
(i) be a random daytime sample of one litre volume; or
(ii) use a fixed stagnation time method that better reflects the national situation, provided that, at the water supply zone level, this does not result in fewer cases of non-compliance than using the random daytime method; and
(c) a sample for microbiological parameters at the point of compliance must be taken and handled in accordance with sampling purpose B of European standard EN ISO 19458:2006 entitled “Water quality - Sampling for microbiological analysis (ISO 19458:2006)”.

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Source: https://www.legislation.gov.uk/ssi/2014/364/schedule/1A/paragraph/2n3 (the official version)
Page: https://openlegislation.uk/public-water-supplies-scotland-regulations-2014/schedule-1A/paragraph-2n3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.