Frequency distribution of concentration of total ammonium (mg N/l) in rivers in European countries, 2006 or the latest year with available data

• Albania
• Austria
• Belgium
• Bosnia and Herzegovina
• Bulgaria
• Croatia
• Czechia
• Denmark
• Estonia
• Finland
• France
• Germany
• Greece
• Hungary
• Ireland
• Italy
• Latvia
• Liechtenstein
• Lithuania
• Luxembourg
• North Macedonia
• Montenegro
• Netherlands
• Norway
• Poland
• Portugal
• Romania
• Serbia
• Slovakia
• Slovenia
• Spain
• Sweden
• United Kingdom

The number of stations with annual means within each concentration band are calculated for the latest year for which data are available. The latest year is 2006 for all countries except Albania (AL), Italy (IT), Liechtenstein (LI) and the United Kingdom (GB) (all 2005), Denmark (DK) and Greece (GR) (both 2004) and the Netherlands (NL) (2002).