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Figure Conservation status of species of European interest in lake and river ecosystems
Statistics by region on the left, overall statistics on the right
Located in Data and maps Maps and graphs
Figure Conservation status of habitat types of European Union interest in lake and river ecosystems
Statistics by region on the left, overall statistics on the right.
Located in Data and maps Maps and graphs
Briefing Freshwater quality — nutrients in rivers
Located in SOER 2015 — The European environment — state and outlook 2015 Cross-country comparisons
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
Indicator Assessment Oxygen consuming substances in rivers (CSI 019/WAT 002) - Assessment published Oct 2012
Concentrations of BOD and total ammonium have decreased in European rivers in the period 1992 to 2010 (Fig. 1), mainly due to general improvement in wastewater treatment. See also WISE interactive maps: Mean annual BOD in rivers and Mean annual Total Ammonium in rivers
Located in Data and maps Indicators Oxygen consuming substances in rivers
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 Total ammonium concentrations in rivers between 1992 and 2010 in different geographical regions of Europe
The data series per region are calculated as the average of the annual mean for river monitoring stations in the region. Only complete series after inter/extrapolation are included (see indicator specification). The number of river monitoring stations included per geographical region is given in parentheses.
Located in Data and maps Maps and graphs
Figure Nitrate concentrations in rivers between 1992 and 2010 in different geographical regions of Europe.
The data series per region are calculated as the average of the annual mean for river monitoring stations in the region. Only complete series after inter/extrapolation are included (see indicator specification). The number of river monitoring stations included per geographical region is given in parentheses
Located in Data and maps Maps and graphs
Daviz Visualization application/vnd.symbian.install Rivers - BOD - trend analysis
Located in Data and maps Data visualisation
Data Waterbase - Rivers
Waterbase is the generic name given to the EEA's databases on the status and quality of Europe's rivers, lakes, groundwater bodies and transitional, coastal and marine waters, and on the quantity of Europe's water resources
Located in Data and maps Datasets
European Environment Agency (EEA)
Kongens Nytorv 6
1050 Copenhagen K
Denmark
Phone: +45 3336 7100