Nitrogen and phosphorus
Release of these two elements into water can result in eutrophication. Chemicals are a major source of these emissions. In our matched samples of 20 countries, 2008 nitrogen emissions to water are down by 18.7% since the year before and 33.4% since 2003. Phosphorus emissions decreased in 2008 by 26.6% since 2007 and by 54.7% since 2003.
Nitrogen to water
Phosphorus to water
Chemical Oxygen Demand (COD)
COD is the potential of chemical emissions to water to remove dissolved oxygen that would otherwise support fish and other aquatic life. In our matched sample from 21 countries the 2008 emissions show a reduction of 17% since 2007 and 36.5% compared to 2003.