Distribution of chemical status of groundwater, rivers, lakes, transitional and coastal waters.
Number of Member States contributing to the data set: groundwater (25); rivers (26); lakes (24); transitional (16) and coastal (22). Percentages shown for rivers, lakes, transitional and coastal are by water body count. Groundwater percentages, however, are expressed by area. The number of water bodies is provided in parentheses.
Data from Sweden are excluded from surface water data illustrated in the figure. This is because Sweden contributed a disproportionately large amount of data, and classified all its surface waters as having poor status, since levels of mercury found within biota in both fresh and coastal waters exceed quality standards