The ecological status of the natural waterbodies is assessed in 5 classes going from 1 to 5 (high, good, moderate, poor, bad). The classification of the ecological status is based on the biological quality elements, physico-chemical quality elements and in some cases also the hydromorphological quality elements.
Description copied from [catalog.inspire.geoportail.lu](https://catalog.inspire.geoportail.lu/geonetwork/srv/eng/catalog.search#/metadata/d5a30afa-ff66-411e-9269-0d1909d0171c).
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