Analyses of substances in biota are carried out once per year at selected monitoring stations.
Crustacean analyses have been conducted annually in spring since 2019, while fish analyses have been conducted annually in autumn since 2015.
The chemicals analysed include priority substances and priority hazardous substances with a tendency to accumulate in biota, in accordance with the Water Framework Directive (2000/60/EC) and the Environmental Quality Standards Directive (2008/105/EC).
Parameters analysed in fish are identified by the suffix _FISH, and those analysed in crustaceans by the suffix _GAM.

Description copied from catalog.inspire.geoportail.lu.