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3.1.1.1. Selection of reference pesticides

The report focuses on pesticides, which represent a current water pollution and are still being discharged through use. The selection of pesticides for evaluation was limited to substances that were reported in the period under review 2007 -2017, because temporal coverage of pesticides data starts increasing after 1990 and, in terms of available records per year, more notably increases after 2006, with the largest number of records available for 2013 and 2014. Furthermore, the following criteria were used for the selection of substances: (i) approved and approval expired during the investigation period 2007 – 2017; (ii) measured in three or more Member States; (iii) mainly used for agriculture (pesticides).