Fig. 3From: A harmonized Danube basin-wide multi-compartment concentration database to support inventories of micropollutant emissions to surface watersData availability on country level. All countries with > 2000 km2 area in the DRB (contracting parties of the ICPDR) are shown. The number of measurements is normalized with the area of the country in the DRB. Where no data for an environmental compartment are available, no point is shownBack to article page