(b)
Codified version
when designated waters undergo natural enrichment in certain substances, so that the values set out in Annex I are not respected. Natural enrichment means the process whereby, without human intervention, a given body of water receives from the soil certain substances contained therein.
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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.