Urban wastewater treatment

Figure Created 12 Nov 2009 Published 12 Nov 2009 Last modified 29 Nov 2012
Only countries with data from all periods included



Additional information

Number of countries in brackets. Northern: Iceland, Norway, Sweden, Finland; Western: Austria, Ireland, United Kingdom, Luxembourg, the Netherlands, Germany, Denmark; Southern: Greece, Spain. Primary wastewater treatment removes part of the suspended solids, but no ammonium; secondary (biological) treatment uses aerobic or anaerobic micro-organisms, retains 20 % to 30 % of the nutrients and removes around 75 % ammonium; tertiary treatment includes phosphorus retention and in some cases nitrogen removal.

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Assessments supported

European Environment Agency (EEA)
Kongens Nytorv 6
1050 Copenhagen K
Phone: +45 3336 7100