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| 133. | The reference concepts for adverse effects comprise the ‘ecological [relevant for surface waters], chemical [relevant for both surface waters and groundwaters] and/or quantitative status [relevant for groundwater] and/or the ecological potential [relevant for heavily and artificially modified water bodies] as defined in Directive 2000/60/EC’ of the waters concerned. Taking account of the differences between chemical status for surface waters and groundwaters, this means that there are five separate kinds of status that may have to be considered, and that reference must be made to the Water Framework Directive for their definitions. As Box 11 below shows, there are express definitions of ‘ecological status’ and ‘quantitative status’; on the other hand, the definitions of ‘chemical status’ and ‘ecological potential’ must be inferred from definitions of ‘good chemical status’ and ‘good ecological potential’. Box 11: Reference concepts as defined in the Water Framework Directive.

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Source: EUR-Lex (Cellar) · retrieved 2026-09-25 · Text as adopted (Official Journal); later amendments are not incorporated in this text.