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Indicator Assessment Nutrients in freshwater (CSI 020/WAT 003) - Assessment published Oct 2012
Average nitrate concentrations in European groundwaters increased from 1992 to 1998, but have declined again since 2004. The average nitrate concentration in European rivers decreased by approximately 11% between 1992 and 2010 (from 2.5 to 2.2 mg/l N), reflecting the effect of measures to reduce agricultural inputs of nitrate as well as improvement in wastewater treatment. Average orthophosphate concentrations in European rivers have decreased markedly over the last two decades, being more than halved between 1992 and 2010 (54% decrease). Also average lake phosphorus concentration decreased over the period 1992-2010 (by 31%), the major part of the decrease occurring in the beginning of the period, but is still ongoing. The decrease in phosphorus concentrations reflects both improvement in wastewater treatment and reduction in phosphorus in detergents. Overall, reductions in the levels of freshwater nutrients over the last two decades primarily reflect improvements in wastewater treatment. Emissions from agriculture continue to be a significant source.
Located in Data and maps Indicators Nutrients in freshwater
Figure Phosphorous levels in the water of large mountain lakes in Switzerland
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Located in Data and maps Maps and graphs
Figure C source code Phosphorus emission intensity of domestic sector in period 1990, 2000-2009 in 23 European countries (EU20 + Switzerland, Norway and Turkey)
The chart displays changes in phosphorus emission intensity of domestic sector in 1990, 2000 and 2009. Phosphorus emission intensity is expressed as kilogram of phosphorus discharged in water per inhabitant and year. Two sets of values are displayed for emission intensity for 2009. (1) Values calculated on the basis of default population equivalents and treatment efficiencies and (2) values calculated as sum of emission load reported voluntarily under the UWWTD and calculated load generated by population not connected to waste water treatment.
Located in Data and maps Maps and graphs
Figure Phosphorus concentration in European lakes and reservoirs
Note: Number of lakes per country: AT(26), BG(4), CH(22), DE(300), DK(28), EE(156), ES(96), FI(70), FR(27), HU(4), IE(18), IT(7), IV(10), MK(3), NL(112), NO(401), PL(290), PT(18), RO(33), SE(2992), SL(4), UK(66).
Located in Data and maps Maps and graphs
Figure Phosphorus concentrations in rivers (orthophosphate) between 1992 and 2009 in different sea regions of Europe
The sea region data series are calculated as the average of annual mean data from river monitoring stations in each sea region. The data thus represents rivers or river basins draining into that particular sea. Only complete series after inter/extrapolation are included (see indicator specification). The number of river monitoring stations per region is given in parentheses.
Located in Data and maps Maps and graphs
Daviz Visualization Phosphorus concentrations in rivers (orthophosphate) between 1992 and 2011 in different sea regions of Europe
Located in Data and maps Data visualisation
Figure Phosphorus concentrations in rivers (orthophosphate) between 1992 and 2011 in different sea regions of Europe
The sea region data series are calculated as the average of annual mean concentrations for river monitoring stations in each sea region. The data thus represents rivers or river basins draining into that particular sea. Only complete series after inter/extrapolation are included (see indicator specification). The number of river monitoring stations per sea region is given in parentheses.
Located in Data and maps Maps and graphs
Figure Phosphorus concentrations in rivers (orthophosphate) between 1992 and 2010 in different sea regions of Europe
The sea region data series are calculated as the average of annual mean data from river monitoring stations in each sea region. The data thus represents rivers or river basins draining into that particular sea. Only complete series after inter/extrapolation are included (see indicator specification). The number of river monitoring stations per sea region is given in parentheses.
Located in Data and maps Maps and graphs
Daviz Visualization Phosphorus concentrations in rivers (orthophosphate) in different sea regions of Europe
Located in Data and maps Data visualisation
Figure Phosphorus concentrations in rivers (orthophosphate) between 1992 and 2008 in different sea regions of Europe
The sea region data series are calculated as the average of annual mean data from river monitoring stations in each sea region. The data thus represents rivers or river basins draining into that particular sea. Only complete series after inter/extrapolation are included (see indicator specification). The number of river monitoring stations per region is given in parentheses.
Located in Data and maps Maps and graphs
European Environment Agency (EEA)
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