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BOD5 concentrations in rivers between 1992 and 2006 in different regions of Europe

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Number of river monitoring stations included in analysis noted in brackets

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European data

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Northern Europe: Finland (12). Western Europe: Austria (86),Denmark (12) France (92), Luxembourg (3), United Kingdom (26). Eastern Europe: Czech Republic (64), Estonia (48), Hungary (87), Latvia (39), Lithuania (25), Slovakia (10), Slovenia (13). Southern Europe: Greece (11), Italy (63), Spain (312). Southeastern Europe: Albania (13), Bosnia and Herzegovina (7), Bulgaria (107), FYR of Macedonia (17), Romania (96). BOD7 data from Estonia, Finland, Latvia (1996-2001) and Lithuania (1996-2005) were recalculated into BOD5 data. Concentrations by regions are expressed as the station weighted mean of the annual mean concentrations by countries. Consistent time series trends between 1992 and 2006 (Northern, Western and Eastern Europe), between 2000 and 2006 (Southern Europe) and between 2001 and 2006 (Southeastern Europe) have been calculated using only stations that have recorded concentrations for each year included in the time series with an exception to countries having one year missing concentrations: Bosnia and Herzegovina (BA) and Luxembourg (LU) (both 2003), Albania (AL), Bulgaria (BG), the United Kingdom (GB), Italy (IT), Latvia (LV) and Slovakia (SK) (all 2006) and Greece (GR) having two years missing concentrations (2005, 2006).

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