# The Private Water Supplies (Wales) Regulations 2017, Regulation 14: Sampling and analysis

Extent: E+W

(1) When a local authority monitors a private water supply it must take a sample—
(a) if the water is supplied for domestic purposes, from a tap normally used to supply water for human consumption, and which, if there is more than one tap, is representative of the water supplied to the premises;
(b) if the water is used in a food production undertaking, at the point at which it is used in the undertaking;
(c) if the water is supplied from a tanker, at the point at which it emerges from the tanker;
(d) in any other case at a suitable point.
(2) A random daytime sample of one litre volume must be taken from a consumer’s tap without prior flushing for the purpose of sampling for the copper, lead and nickel parameters.
(3) Sampling under this regulation—
(a) for chemical parameters in the distribution network must be undertaken in accordance with ISO 5667-5, other than where the sample is taken from a consumer’s tap;
(b) for microbiological parameters must be undertaken in accordance with—
(i) EN ISO 19458 sampling purpose A in the distribution network; and
(ii) EN ISO 19458 sampling purpose B at the consumer’s tap.
(4) The local authority must ensure that the sample is analysed in accordance with Schedule 4.

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Source: https://www.legislation.gov.uk/wsi/2017/1041/regulation/14 (the official version)
Page: https://openlegislation.uk/private-water-supplies-wales-regulations-2017/regulation-14
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.