File:Annual average river nitrate concentration averaged by National River Basin Districts (mg N per l), (2009), EU-27 and EFTA.png
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Annual average river nitrate concentration averaged by National River Basin Districts (mg N per l), (2009), EU-27 and EFTA.
Graph created with data from 2009.
Data extracted in November 2012. Most recent data available at:
EEA website WISE-SoE Rivers at: http://www.eea.europa.eu/data-and-maps/data/waterbase-rivers-8
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