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Qualitative data on pesticides according to the chemical and ecological status assessment under the Water Framework Directive is restricted at European level to the six yearly WFD reporting cycle. Latest 2016 reporting requirements included substances causing failure of chemical status of surface water bodies. For these priority substances EU-wide EQS (ecological quality standard) values were regulated and therefore failings of good chemical status are comparable. This is also valid for groundwater pollutants to assess the chemical status of groundwater bodies. Much more pesticides are listed under the river basin specific pollutants to assess the ecological status of surface waters. For those substances, EQS were regulated on a national basis and therefore differ between Member States. Assessments with these EQS might be not comparable.