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Figure 7.11: Concentration range (1^st quartile, median and 3^rd quartile) of annual average nutrient and organic matter pollutant concentrations in river water bodies in different classes of ecological status or potential (high to bad).

Note: Preliminary results based on 800-1000 river water bodies with annual average water quality concentration values (average of the years 2005 to 2009) compared with the ecological status/potential at water body level.

Based on results from 10 Member States.