Trends in total ammonium concentrations at river stations in European countries between 1992 and 2002

Figure Created 12 Nov 2009 Published 12 Nov 2009 Last modified 29 Nov 2012
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Number of river monitoring stations included in analysis noted in brackets


European data


Additional information

BOD5 data used for all countries except Estonia where BOD7 data used. Data are from representative river stations. Stations that have no designation of type are assumed to be representative and are included in the analysis. Time series trends have been calculated using only stations that have recorded concentrations for at least 4 of the years included in the time series. Sen's Test then applied to determine statistically significant trends in the data (see Methodology section for further details).

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