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Research and analysis

B1a: Riverine inputs of selected metals into English tidal waters, 2008 to 2019

Updated 1 December 2025
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year metal value
2008 Cadmium 100.0
2009 Cadmium 108.9045549
2010 Cadmium 60.00548629
2011 Cadmium 59.32863293
2012 Cadmium 96.94299042
2013 Cadmium 64.65312076
2014 Cadmium 86.21970853
2015 Cadmium 48.0045748
2016 Cadmium 49.09488903
2017 Cadmium 63.8411253
2018 Cadmium 41.9819548
2019 Cadmium 51.48585225
2008 Copper 100.0
2009 Copper 85.90201016
2010 Copper 61.00212186
2011 Copper 50.78497182
2012 Copper 94.92682428
2013 Copper 64.26931879
2014 Copper 94.3190584
2015 Copper 49.28327382
2016 Copper 61.37248745
2017 Copper 66.25747106
2018 Copper 53.89021475
2019 Copper 58.70768153
2008 Lead 100.0
2009 Lead 167.3454765
2010 Lead 67.13936087
2011 Lead 81.53852677
2012 Lead 211.0730546
2013 Lead 91.93911392
2014 Lead 107.7478279
2015 Lead 58.47414514
2016 Lead 56.63642318
2017 Lead 105.80292
2018 Lead 55.87305972
2019 Lead 78.89476881
2008 Mercury 100.0
2009 Mercury 66.39264531
2010 Mercury 67.42796596
2011 Mercury 51.55493786
2012 Mercury 91.92382054
2013 Mercury 82.54548879
2014 Mercury 84.56394659
2015 Mercury 47.82585521
2016 Mercury 63.68437133
2017 Mercury 63.27943979
2018 Mercury 45.70681992
2019 Mercury 54.71587886
2008 Zinc 100.0
2009 Zinc 103.3917075
2010 Zinc 63.29907919
2011 Zinc 65.9079589
2012 Zinc 108.4821672
2013 Zinc 70.95191714
2014 Zinc 99.73690019
2015 Zinc 54.13814
2016 Zinc 60.90452259
2017 Zinc 67.00755621
2018 Zinc 81.14911492
2019 Zinc 68.33728807
2008 flow 100.0
2009 flow 78.31492129
2010 flow 65.42533127
2011 flow 62.7103821
2012 flow 108.1184197
2013 flow 81.36298833
2014 flow 99.45438158
2015 flow 82.66669288
2016 flow 79.18649536
2017 flow 65.64258774
2018 flow 73.22303524
2019 flow 90.11383853