Fig. 2From: Environmental quality standards for diclofenac derived under the European water framework directive: 2. Avian secondary poisoningCumulative frequency distributions of diclofenac concentrations in samples from Flanders (light blue), France (mid blue), and Germany (dark blue) (data from [29]. The EQS for secondary poisoning derived by the EC [14] is indicated by the vertical black dotted line, and the EQS derived in the present study is indicated by the vertical black dashed lineBack to article page