- BOD5 Legend

Note: Concentrations are expressed as annual mean concentrations. Only complete series after inter/extrapolation are included (see indicator specification). Two time series are depicted – the longer time series with less stations and the shorter time series with more stations. The number of river monitoring stations included per country is given in parenthesis. BOD7 data has been recalculated into BOD5 data.
1992-2015: Europe (543), Albania (6), Austria (46), Belgium (26), Bulgaria (66), Czech Republic (19), Denmark (4), Estonia (48), Finland (5), North Macedonia (9), France (181), Ireland (3), Latvia (17), Lithuania (24), Luxembourg (3), Slovakia (18), Slovenia (10),  Spain (32), Sweden (1), United Kingdom (25).
2000-2015: Europe (1160), Albania (6), Austria (48), Belgium (36), Bosnia and Herzegovina (19), Bulgaria (91), Croatia (40), Cyprus (4), Czech Republic (19), Denmark (4), Estonia (51), Finland (6), North Macedonia (19), France (245), Ireland (54), Italy (73), Latvia (21), Lithuania (24), Luxembourg (3), Poland (103), Romania (115), Slovakia (18), Slovenia (10), Spain (69), Sweden (1), United Kingdom (81).

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