Exceedances of (left) effect thresholds in Europe’s surface waters for the pesticide imidacloprid in 2020; and (right) quality standards in Europe’s groundwater for the pesticide atrazine in 2020

‘Unknown’ means that the substance was detected but the concentration was below the limit of quantification (LoQ) and the LoQ was higher than the assessment threshold. This means that it is impossible to determine whether there was an exceedance or not. The data reported for imidacloprid in surface waters cover 16 countries. The data reported for atrazine cover 18 countries. For the methodology, see ETC/ICM (2020).