Regional grouping :
Goal 14. Conserve and sustainably use the oceans, seas and marine resources for sustainable development
Target Target 14.1 By 2025, prevent and significantly reduce marine pollution of all kinds, in particular from land-based activities, including marine debris and nutrient pollution
14.1.1 (a) Index of coastal eutrophication; and (b) plastic debris density
Series:
Chlorophyll-a deviations, remote sensing (%)
| Country/Area grouping | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
| Algeria | 0.4 | 2.7 | 3.0 | 2.7 | 5.0 | 0.8 | 8.2 | 2.6 | 0.7 | 1.2 | 11.4 | 12.4 | 3.0 | 0.4 | 0.5 | 5.7 | 2.3 | 2.2 | 2.7 | 0.2 | ... |
| Angola | 8.6 | 14.6 | 10.3 | 8.2 | 6.3 | 6.9 | 5.7 | 5.5 | 10.2 | 4.4 | 3.9 | 4.9 | 7.7 | 5.7 | 3.0 | 4.6 | 3.2 | 4.8 | 1.5 | 4.6 | ... |
| Cameroon | 3.9 | 3.9 | 7.8 | 12.0 | 6.7 | 7.8 | 10.7 | 8.4 | 6.5 | 7.9 | 5.6 | 6.8 | 6.8 | 9.2 | 11.5 | 11.4 | 11.4 | 11.7 | 8.1 | 10.1 | ... |
| Cabo Verde | 8.6 | 1.8 | 1.2 | 1.8 | 4.5 | 1.8 | 3.5 | 1.0 | 0.4 | 2.3 | 2.1 | 9.4 | 10.5 | 3.5 | 3.6 | 13.2 | 2.7 | 3.9 | 3.0 | 2.0 | ... |
| Comoros | 4.0 | 0.1 | 0.6 | 0.2 | 0.5 | 0.2 | 0.0 | 0.3 | 0.1 | 0.3 | 0.2 | 0.0 | 1.2 | 0.3 | 0.0 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | ... |
| Congo | 26.7 | 13.8 | 22.0 | 30.5 | 19.6 | 23.5 | 28.0 | 18.2 | 16.4 | 13.0 | 22.8 | 14.6 | 16.7 | 12.8 | 13.4 | 13.9 | 17.7 | 17.1 | 8.8 | 17.8 | ... |
| Democratic Republic of the Congo | 21.4 | 14.4 | 17.9 | 29.1 | 21.9 | 24.4 | 24.6 | 18.3 | 20.7 | 9.2 | 15.7 | 19.2 | 24.2 | 9.2 | 12.6 | 14.3 | 9.3 | 13.7 | 8.4 | 14.4 | ... |
| Benin | 3.6 | 0.9 | 2.2 | 9.3 | 2.6 | 11.2 | 1.3 | 10.5 | 1.4 | 3.7 | 1.1 | 2.6 | 0.6 | 2.7 | 2.2 | 8.1 | 3.4 | 2.2 | 4.2 | 3.2 | ... |
| Equatorial Guinea | ... | ... | 11.5 | 7.3 | 4.3 | 6.5 | 8.6 | 5.3 | 4.7 | 3.9 | 3.2 | 5.4 | 6.8 | 2.0 | 6.2 | 5.5 | 3.0 | 8.6 | 6.1 | 7.4 | ... |
| Eritrea | 11.4 | 11.7 | 4.6 | 5.3 | 2.3 | 3.9 | 4.0 | 3.0 | 3.8 | 3.9 | 2.3 | 2.5 | 6.2 | 0.8 | 1.6 | 1.6 | 2.3 | 3.1 | 2.4 | 5.4 | ... |
| Djibouti | 43.6 | 58.1 | 11.9 | 5.9 | 5.8 | 0.9 | 1.8 | 1.7 | 6.7 | 5.1 | 1.1 | 0.8 | 1.8 | 1.1 | 2.1 | 2.1 | 19.2 | 4.9 | 5.6 | 5.9 | ... |
| Gabon | 16.6 | 11.5 | 15.3 | 14.8 | 10.5 | 10.1 | 19.1 | 12.0 | 5.5 | 6.8 | 10.4 | 14.9 | 10.6 | 7.2 | 10.8 | 11.4 | 9.1 | 12.1 | 4.9 | 12.4 | ... |
| Gambia, the | 22.8 | 16.9 | 8.5 | 10.6 | 9.6 | 4.8 | 11.4 | 2.4 | 3.9 | 5.2 | 4.5 | 8.6 | 4.6 | 11.1 | 5.8 | 16.2 | 3.1 | 4.4 | 4.0 | 3.4 | ... |
| Ghana | 5.7 | 2.3 | 3.4 | 3.3 | 1.1 | 8.5 | 2.8 | 0.9 | 1.7 | 1.1 | 1.7 | 2.6 | 2.3 | 1.4 | 3.4 | 5.0 | 4.7 | 4.7 | 2.0 | 1.5 | ... |
| Guinea | ... | ... | 3.8 | 3.7 | 2.9 | 2.6 | 10.4 | 7.7 | 10.2 | 4.0 | 5.2 | 9.9 | 9.8 | 8.6 | 3.3 | 12.8 | 10.4 | 1.8 | 2.0 | 3.0 | ... |
| Cote d'Ivoire | 6.1 | 5.5 | 3.6 | 1.8 | 1.9 | 11.7 | 5.4 | 1.5 | 2.5 | 2.7 | 1.6 | 4.2 | 2.3 | 3.2 | 2.5 | 1.6 | 9.6 | 3.4 | 1.4 | 2.9 | ... |
| Kenya | ... | ... | 0.6 | 0.5 | 2.3 | 3.0 | 0.8 | 0.2 | 0.2 | 1.0 | 2.9 | 2.6 | 1.4 | 2.8 | 5.2 | 0.9 | 0.1 | 0.1 | 0.1 | 0.5 | ... |
| Liberia | 1.3 | 4.4 | 1.8 | 1.0 | 1.6 | 8.0 | 2.9 | 1.5 | 1.1 | 1.3 | 1.9 | 4.0 | 3.7 | 2.4 | 2.7 | 1.2 | 18.8 | 5.1 | 2.3 | 1.6 | ... |
| Libya | 0.1 | 0.5 | 0.2 | 0.6 | 0.6 | 0.1 | 0.1 | 0.2 | 0.1 | 0.2 | 0.1 | 0.1 | 0.2 | 0.1 | 0.1 | 0.1 | 0.5 | 0.1 | 0.5 | 0.1 | ... |
| Madagascar | 3.4 | 1.6 | 2.0 | 2.1 | 2.8 | 3.8 | 1.0 | 0.5 | 1.4 | 1.4 | 0.9 | 1.5 | 0.9 | 0.2 | 1.7 | 1.3 | 4.2 | 4.1 | 0.7 | 1.1 | ... |
| Mauritania | 24.6 | 6.4 | 1.9 | 4.5 | 12.1 | 6.4 | 5.7 | 1.4 | 1.7 | 6.4 | 7.8 | 6.2 | 7.5 | 3.2 | 5.3 | 14.8 | 13.5 | 2.7 | 5.6 | 1.9 | ... |
| Mauritius | ... | ... | 1.2 | 2.3 | 0.5 | 1.2 | 0.4 | 0.4 | 3.6 | 0.2 | 1.2 | 0.2 | 0.6 | 0.1 | 1.0 | 0.2 | 0.2 | 0.3 | 1.2 | 0.1 | ... |
| Morocco | 2.0 | 2.1 | 5.4 | 3.2 | 4.1 | 3.5 | 6.7 | 1.1 | 2.4 | 10.4 | 3.2 | 6.0 | 5.1 | 2.3 | 2.2 | 3.6 | 1.7 | 2.0 | 2.8 | 1.5 | ... |
| Mozambique | 3.2 | 1.5 | 1.6 | 1.2 | 1.1 | 3.6 | 0.7 | 1.0 | 0.9 | 1.1 | 1.0 | 1.1 | 0.9 | 0.4 | 0.9 | 1.0 | 2.6 | 4.3 | 1.2 | 0.5 | ... |
| Namibia | 11.2 | 14.0 | 7.2 | 4.1 | 10.3 | 7.2 | 9.4 | 6.6 | 6.5 | 12.7 | 6.5 | 6.6 | 4.8 | 4.4 | 7.8 | 6.6 | 7.4 | 4.9 | 1.1 | 4.4 | ... |
| Nigeria | 1.6 | 1.3 | 2.4 | 6.8 | 3.0 | 7.6 | 3.9 | 4.4 | 3.6 | 3.8 | 2.3 | 5.8 | 3.7 | 4.9 | 4.3 | 7.2 | 7.8 | 3.2 | 4.1 | 6.1 | ... |
| Guinea-Bissau | 16.7 | 7.7 | 3.7 | 6.2 | 3.2 | 4.4 | 14.1 | 4.9 | 7.3 | 6.1 | 2.3 | 7.6 | 8.4 | 5.7 | 3.1 | 9.1 | 8.3 | 1.6 | 1.0 | 3.0 | ... |
| Sao Tome and Principe | 1.1 | 0.4 | 5.2 | 1.6 | 1.8 | 1.2 | 2.8 | 0.7 | 0.8 | 1.6 | 2.3 | 3.1 | 2.5 | 0.5 | 2.5 | 1.5 | 1.1 | 1.1 | 1.1 | 1.2 | ... |
| Senegal | 26.7 | 12.6 | 5.1 | 6.8 | 9.3 | 4.9 | 8.2 | 1.3 | 2.7 | 4.4 | 4.1 | 7.4 | 6.4 | 5.7 | 6.1 | 9.5 | 5.9 | 1.3 | 4.7 | 2.4 | ... |
| Seychelles | 5.6 | 1.9 | 1.1 | 0.3 | 0.3 | 0.5 | 0.9 | 0.2 | 0.3 | 0.2 | 0.3 | 0.2 | 0.5 | 0.2 | 1.4 | 1.8 | 0.7 | 1.3 | 0.4 | 0.2 | ... |
| Sierra Leone | 1.8 | 6.4 | 3.4 | 2.7 | 2.7 | 5.1 | 3.4 | 5.0 | 1.5 | 1.6 | 1.8 | 5.9 | 6.0 | 5.1 | 4.3 | 4.6 | 26.5 | 4.5 | 3.5 | 1.7 | ... |
| Somalia | 10.1 | 8.5 | 5.2 | 2.9 | 2.3 | 1.0 | 1.1 | 2.0 | 1.6 | 1.3 | 1.5 | 1.4 | 1.9 | 1.2 | 1.7 | 2.7 | 2.5 | 0.9 | 1.5 | 2.2 | ... |
| South Africa | ... | ... | 1.9 | 2.5 | 2.0 | 2.6 | 4.0 | 2.6 | 4.8 | 2.6 | 3.2 | 3.8 | 2.1 | 1.3 | 2.6 | 5.0 | 2.3 | 6.2 | 5.4 | 2.8 | ... |
| Sudan | 5.0 | 9.6 | 2.9 | 4.3 | 1.6 | 2.0 | 1.7 | 5.7 | 2.4 | 4.0 | 2.3 | 1.6 | 9.9 | 1.3 | 1.2 | 3.6 | 1.7 | 1.5 | 2.0 | 1.9 | ... |
| Togo | 5.7 | 3.2 | 3.6 | 10.6 | 1.9 | 10.8 | 2.0 | 9.8 | 1.4 | 2.4 | 1.9 | 3.5 | 1.5 | 5.5 | 2.9 | 8.7 | 2.7 | 4.0 | 3.3 | 1.7 | ... |
| Tunisia | 3.4 | 2.2 | 3.6 | 2.1 | 1.7 | 0.6 | 4.2 | 1.0 | 0.6 | 1.1 | 4.6 | 2.0 | 1.6 | 0.1 | 0.2 | 1.1 | 0.5 | 0.2 | 2.0 | 0.5 | ... |
| Egypt | 1.0 | 0.4 | 0.4 | 0.6 | 1.2 | 0.3 | 0.2 | 1.2 | 0.3 | 0.9 | 0.4 | 0.2 | 0.9 | 0.5 | 0.3 | 0.3 | 0.5 | 0.8 | 1.4 | 0.3 | ... |
| United Republic of Tanzania | 4.8 | 0.6 | 0.6 | 0.1 | 1.4 | 0.3 | 0.3 | 0.2 | 0.1 | 0.6 | 0.4 | 0.1 | 0.8 | 0.7 | 0.1 | 0.5 | 0.1 | 0.6 | 0.1 | 0.2 | ... |
| Africa | ... | ... | 4.1 | 6.0 | 4.5 | 6.1 | 5.4 | 4.2 | 4.2 | 3.5 | 3.9 | 5.3 | 5.2 | 3.4 | 3.7 | 5.3 | 4.8 | 3.9 | 3.2 | 3.8 | ... |