preamble_15

Council Directive 78/659/EEC of 18 July 1978 on the quality of fresh waters needing protection or improvement in order to support fish life · European Union

Whereas to ensure that the quality of waters capable of supporting freshwater fish is checked, a minimum number of samples should be taken and the measurements relating to parameters set out in the Annex should be carried out ; whereas such sampling may be reduced or discontinued in the light of the quality of the water;

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Source: EUR-Lex (Cellar) · retrieved 2026-10-13 · Text as adopted (Official Journal); later amendments are not incorporated in this text.