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Council Directive 75/440/EEC of 16 June 1975 concerning the quality required of surface water intended for the abstraction of drinking water in the Member States · European Union

For the purposes of Article 4 surface water shall be assumed to conform to the relevant parameters if samples of this water taken at regular intervals at the same sampling point and used in the abstraction of drinking water show that it complies with the parametric values for the water quality in question, in the case of: - 95 % of the samples for parameters conforming to those specified in the "I" columns in Annex II, 90 % of the samples in all other cases, and if in the case of the 5 or 10 % of the samples which do not comply: (a) the water does not deviate from the parametric values in question by more than 50 %, except for temperature, pH, dissolved oxygen and microbiological parameters; there can be no resultant danger to public health; consecutive water samples taken at statistically suitable intervals do not deviate from the relevant parametric values.

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Source: EUR-Lex (Cellar) · retrieved 2026-10-12 · Text as adopted (Official Journal); later amendments are not incorporated in this text.