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In Azerbaijan, river data are available from 2001. A strong decrease in average river nitrate concentration occurred from 2005, and particularly from 2011 onwards, reaching very low average levels from 2014 onwards. The time series pattern was fairly similar between the different regions. For river phosphate concentration, the time series showed different patterns between regions. The concentrations in Gazakh-Ganja, and particularly in Shirvan, increased markedly between 2009-2011. A slower, but steady increase also occurred in the Guba-Khachmaz region. These patterns are reflected in the overall time series for the whole country, where the average phosphate concentration doubled between 2001-2011.