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GIS Map Application Macroinvertebrates in rivers
The map shows the ecological status or potential of European rivers, expressed using a specific biological quality element (BQE), namely macroinvertebrates, reported by EEA member countries via WISE. The ecological status class is assessed by each country according to their national classification system, following the principles established by the Water Framework Directive (WFD). The assessment may be based by one or more samples taken during the year of reporting. The map displays the latest reported information under the WISE SoE reporting, so the year of reference may vary. Note that under the WFD reporting, the ecological status or potential based on all BQEs combined is represented by the BQE with the worst class - the "one-out-all-out" principle - which does not apply here, given that only one BQE is represented and that the reporting is done annually. The purpose of the map to enable the user to compare values per country or per monitoring station, depending on the scale of visualisation.
Located in Data and maps Interactive maps
Figure Proportion of classified river and lake water bodies in different River Basin Districts (RBD) holding less than good ecological status or potential for rivers and lakes
The figure shows percentage of the total number of classified water bodies.
Located in Data and maps Maps and graphs
Daviz Visualization Changes in water quality variables during the last two decades
Located in Data and maps Data visualisation
Daviz Visualization D source code Rivers - European trends
Located in Data and maps Data visualisation
Daviz Visualization Rivers - ammonium
Located in Data and maps Data visualisation
Daviz Visualization Rivers - Biochemical Oxygen Demand
Located in Data and maps Data visualisation
Indicator Assessment Oxygen consuming substances in rivers (CSI 019/WAT 002) - Assessment published Feb 2015
Concentrations of biochemical oxygen demand (BOD) and total ammonium have decreased in European rivers in the period 1992 to 2012 (Fig. 1), mainly due to general improvement in waste water treatment.
Located in Data and maps Indicators Oxygen consuming substances in rivers
Daviz Visualization D source code Nutrient trend
The data series are calculated as the average of annual mean concentrations for groundwater bodies/river stations/lake stations in Europe. Only complete series after inter/extrapolation are included (see indicator specification). The number of groundwater bodies/river stations/lake stations included per country is given in the notes below the individual substance charts.
Located in Data and maps Data visualisation
Indicator Assessment Nutrients in freshwater (CSI 020/WAT 003) - Assessment published Feb 2015
Since 2005, average nitrate concentrations in European groundwater have declined and in 2011, the mean concentration had almost returned to the 1992 level. The average nitrate concentration in European rivers declined by 0.03 milligrams per liter of nitrogen (mg N/l) (0.8%) per year over the period 1992 to 2012. The decline in nitrate concentration reflects the effect of measures to reduce agricultural inputs of nitrate, as well as improvements in wastewater treatment. Average orthophosphate concentration in European rivers has decreased markedly over the last two decades (0.003 milligrams per liter of phosphorous (mg P/l) or 2.1% per year). Also, average lake phosphorus concentration decreased over the period 1992-2012 (0.0004 mg P/l, or 0.8% per year). The decrease in phosphorus concentration reflects both improvements in wastewater treatment and the reduction of phosphorus in detergents.
Located in Data and maps Indicators Nutrients in freshwater
Briefing Freshwater quality — nutrients in rivers
Located in SOER 2015 — The European environment — state and outlook 2015 Cross-country comparisons
European Environment Agency (EEA)
Kongens Nytorv 6
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Denmark
Phone: +45 3336 7100