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Compared to 10-15 years ago many countries and RBD now have low concentration of  BOD. River basins with the lowest BOD concentration (class 1: < 1.4 mg O2/l) are for example found in Ireland, Scotland, and Wales, in Denmark and southern Finland and in Austria and southern France. RBDs with the highest BOD concentrations (class 4&5: >= 3 mg O2/l) are found in Belgium, Bulgaria, and Romania.

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  • Corina Boscornea (invited by kristpet (disabled)) 13 Apr 2012 10:01:31

    The data sources of these figure and values should be indicated since these data were not reported in the river basin management plans (possible SoE)

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