The purpose of the present Ordinance is to transpose the Directive Council Directive 78/659/EEC on the quality of fresh waters needing protection or improvement in order to support fish life of 18 July 1978 into German law. In particular, the Ordinance lays down provisions relating to the quality of fresh fish waters. However, the Ordinance shall not apply to waters in natural or artificial fish ponds used for intensive fish farming. Waters are divide into salmonid waters and cyprinid waters and