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Assessment

Nitrate in groundwater

The average nitrate concentration in European groundwater has been stable since 1992. The shorter, but more representative time series from 2000 follows the longer one closely, but the concentration level is slightly lower. The lack of a marked trend at European level does not imply limited changes in groundwater nitrate concentrations overall, but rather that the number of groundwater bodies (GWBs) with increasing and decreasing trends is similar.