ANNEX II

Total zinc concentrations (mg/l Zn) for different water hardness values between 10 and 500 mg/l CaCO_(3): Water hardness (mg/l CaCO_(3)) 10 50 100 500 Salmonid waters (mg/l Zn) 0,03 0,2 0,3 0,5 Cyprinid waters (mg/l Zn) 0,3 0,7 1,0 2,0 Dissolved copper concentrations (mg/l Cu) for different water hardness values between 10 and 300 mg/l CaCO_(3): The presence of fish in waters containing higher concentrations of copper may indicate a predominance of dissolved organo-cupric complexes. Water hardness (mg/l CaCO_(3)) 10 50 100 300 mg/l Cu 0,005 0,022 0,04 0,112

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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.