Fig. 7From: A harmonized Danube basin-wide multi-compartment concentration database to support inventories of micropollutant emissions to surface watersPFAS concentration in effluent of municipal WWTP in the DRB depending on the size of the WWTP given in PE. Values below LOQ (range given as red dashed boxes) were imputed using ROS under assumption of a lognormal distribution. The number of observations (N) is shown above each boxplot. The numbers underlaying this figure can be found in Additional file 1Back to article page