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Figure Biochemical Oxygen Demand (BOD5) and total ammonium concentrations in rivers between 1992 and 2007
Numbers of river monitoring stations in brackets
Located in Data and maps Maps and graphs
Figure D source code Biochemical Oxygen Demand (BOD5) and total ammonium concentrations in rivers between 1992 and 2008
Concentrations are expressed as the average of annual mean concentrations. Up to 3-year gaps of missing values have been interpolated or extrapolated. Only complete series with no missing values after this interpolation/extrapolation are included. Number of river monitoring stations included in analysis per country is noted in brackets. BOD7 data has been recalculated into BOD5 data.
Located in Data and maps Maps and graphs
Figure Biochemical Oxygen Demand (BOD5) and total ammonium concentrations in rivers between 1992 and 2009
Concentrations are expressed as the average of annual mean concentrations. Up to 3-year gaps of missing values have been interpolated or extrapolated. Only complete series with no missing values after this interpolation/extrapolation are included. The number of river monitoring stations included in the analysis is noted in brackets. BOD7 data has been recalculated into BOD5 data.
Located in Data and maps Maps and graphs
Figure Biochemical Oxygen Demand (BOD5) and total ammonium concentrations in rivers between 1992 and 2010
Concentrations are expressed as annual mean concentrations. Only complete series after inter/extrapolation are included (see indicator specification). The number of river monitoring stations included per country is given in metadata (see downloads and more info). BOD7 data has been recalculated into BOD5 data.
Located in Data and maps Maps and graphs
Figure Biochemical Oxygen Demand (BOD5) and total ammonium concentrations in rivers between 1992 and 2011
Concentrations are expressed as annual mean concentrations. Only complete series after inter/extrapolation are included (see indicator specification). The number of river monitoring stations included per country is given in metadata (see downloads and more info). BOD7 data has been recalculated into BOD5 data. If data on total ammonium are not available, data on ammonium are included into the data series.
Located in Data and maps Maps and graphs
Highlight Blue-green algae - check the water before you swim
Most beaches, lakes and rivers in Europe were clean and healthy last year. But water quality can be affected by many unforeseen factors, including sewage, agricultural waste and algae. The European Environment Agency (EEA) recommends checking local water quality information before you jump in.
Located in News
Daviz Visualization BOD concentrations in rivers in different geographical regions of Europe.
Located in Data and maps Data visualisation
Daviz Visualization BOD concentrations in rivers in different sea regions of Europe.
Located in Data and maps Data visualisation
GIS Map Application BOD in rivers
The map shows the mean annual value of BOD observed in river monitoring stations since 1993, reported by EEA member countries via WISE. BOD (Biological Oxygen Demand or Biochemical Oxygen Demand) is the amount of dissolved oxygen, expressed in milligrams of oxygen per litre of water, consumed by micro-organisms to decompose the organic matter present in water. BOD is commonly reported as BOD5, the amount of oxygen consumed over a 5-day period of incubation. Some countries report BOD7, the amount of oxygen consumed over a 7-day period. For comparability, the values of BOD7 are converted to BOD5 (BOD7 = 1.16 BOD5). Large quantities of organic matter (microbes and decaying organic waste) in water are a potential risk to aquatic ecosystems and human health. The reduction in the amount of dissolved oxygen as a result of the decomposition of organic matter can endanger aquatic life through asphyxiation and disrupt the ecological balance of the water. Organic matter can also pollute drinking water and bathing water. High levels of BOD can indicate such organic pollution. The purpose of the map is to provide an overview of the mean annual value of BOD in rivers across Europe and to enable the user to compare values per country, River Basin District (RBD) or individual monitoring station, depending on the scale of visualisation. Historical data since 1992 can be displayed using the time slider.
Located in Data and maps Interactive maps
Figure BOD5 concentrations in rivers between 1992 and 2009 draining to different sea regions of Europe
Geographical coverage: Baltic Sea, Black Sea, Celtic Seas, Bay of Biscay, Iberian Cost, Greater North Sea, Mediterranean Sea.
Located in Data and maps Maps and graphs
European Environment Agency (EEA)
Kongens Nytorv 6
1050 Copenhagen K
Denmark
Phone: +45 3336 7100