preamble_133
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
Zinc concentrations (mg/l Zn) for different water hardness values between 10 and 500 mg/l CaCO3: >PIC FILE= "T0013337">
← preamble_132 · All articles · preamble_134 →
Source: EUR-Lex (Cellar) · retrieved 2026-10-13 · Text as adopted (Official Journal); later amendments are not incorporated in this text.