Trends in total ammonium concentrations at river stations in European countries between 1992 and 2003
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&#39;&#39;s Test then applied to determine statistically significant trends in the data (see Methodology section for further details).
For references, please go to www.eea.europa.eu/soer or scan the QR code.
This briefing is part of the EEA's report The European Environment - State and Outlook 2015. The EEA is an official agency of the EU, tasked with providing information on Europe's environment.
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