Lake water quality trophic state (%) by country
Countries reporting
141
Highest
25.9%
Somalia
Lowest
0.0%
Croatia
Median
0.7%
Years covered
5
2017–2021
Data points
895
What the numbers show
Lake water quality trophic state (%) is currently reported for 141 countries. The highest value is 25.9% in Somalia; the lowest is 0.0% in Croatia.
The median across all reporting countries is 0.7%, and the mean is 1.7%.
Lake water quality trophic state: full country ranking
| # | Country | Latest | Year | 10-year change | Trend |
|---|---|---|---|---|---|
| 1 | Somalia | 25.9% | 2021 | — | rising |
| 2 | Angola | 13.4% | 2021 | — | rising |
| 3 | Congo | 12.4% | 2021 | — | flat |
| 4 | Botswana | 9.6% | 2021 | — | falling |
| 5 | Guinea | 9.1% | 2021 | — | rising |
| 6 | Togo | 7.8% | 2021 | — | volatile |
| 7 | South Sudan | 7.1% | 2021 | — | rising |
| 8 | Kyrgyzstan | 7.0% | 2021 | — | falling |
| 9 | Chile | 6.0% | 2021 | — | falling |
| 10 | Peru | 5.8% | 2021 | — | flat |
| 11 | Mozambique | 4.8% | 2021 | — | rising |
| 12 | Canada | 4.3% | 2021 | — | falling |
| 13 | United Kingdom | 4.0% | 2021 | — | falling |
| 13 | United Kingdom of Great Britain and Northern Ireland | 4.0% | 2021 | — | falling |
| 15 | Panama | 4.0% | 2021 | — | rising |
| 16 | Venezuela (Bolivarian Republic of) | 3.9% | 2021 | — | flat |
| 17 | Democratic Republic of the Congo | 3.5% | 2021 | — | falling |
| 18 | Honduras | 3.2% | 2021 | — | falling |
| 19 | Papua New Guinea | 3.0% | 2021 | — | rising |
| 19 | Melanesia | 3.0% | 2021 | — | rising |
| 21 | Rwanda | 2.8% | 2021 | — | falling |
| 22 | Mongolia | 2.8% | 2021 | — | falling |
| 23 | Gabon | 2.7% | 2021 | — | falling |
| 24 | Norway | 2.7% | 2021 | — | volatile |
| 25 | United States | 2.6% | 2021 | — | falling |
| 26 | Ireland | 2.6% | 2021 | — | volatile |
| 27 | Bolivia (Plurinational State of) | 2.5% | 2021 | — | falling |
| 28 | Iceland | 2.4% | 2021 | — | volatile |
| 29 | China | 2.3% | 2021 | — | falling |
| 30 | El Salvador | 2.2% | 2021 | — | volatile |
| 31 | Sweden | 2.1% | 2021 | — | falling |
| 32 | Burkina Faso | 2.1% | 2021 | — | rising |
| 33 | Russia | 2.1% | 2021 | — | falling |
| 33 | Russian Federation | 2.1% | 2021 | — | falling |
| 35 | Cote d'Ivoire | 2.0% | 2021 | — | rising |
| 35 | Côte d'Ivoire | 2.0% | 2021 | — | rising |
| 37 | Indonesia | 1.8% | 2021 | — | volatile |
| 38 | Ecuador | 1.8% | 2021 | — | falling |
| 39 | New Zealand | 1.8% | 2021 | — | falling |
| 40 | India | 1.7% | 2021 | — | rising |
| 41 | Cuba | 1.7% | 2021 | — | falling |
| 42 | Vietnam | 1.7% | 2021 | — | falling |
| 42 | Viet Nam | 1.7% | 2021 | — | falling |
| 44 | Malawi | 1.6% | 2021 | — | rising |
| 45 | Colombia | 1.6% | 2021 | — | falling |
| 46 | Turkey | 1.5% | 2021 | — | volatile |
| 46 | Türkiye | 1.5% | 2021 | — | volatile |
| 48 | Nigeria | 1.5% | 2021 | — | rising |
| 49 | Cameroon | 1.5% | 2021 | — | rising |
| 50 | Argentina | 1.5% | 2021 | — | falling |
| 51 | Tajikistan | 1.4% | 2021 | — | falling |
| 52 | Mali | 1.4% | 2021 | — | falling |
| 53 | United Republic of Tanzania | 1.3% | 2021 | — | rising |
| 54 | Benin | 1.3% | 2021 | — | volatile |
| 55 | Sri Lanka | 1.3% | 2021 | — | rising |
| 56 | Brazil | 1.3% | 2021 | — | rising |
| 57 | Madagascar | 1.2% | 2021 | — | falling |
| 58 | Sudan | 1.1% | 2021 | — | rising |
| 59 | Zimbabwe | 1.1% | 2021 | — | falling |
| 60 | Finland | 1.1% | 2021 | — | falling |
| 61 | Nicaragua | 1.1% | 2021 | — | falling |
| 62 | Egypt | 1.0% | 2021 | — | falling |
| 63 | Czechia | 1.0% | 2021 | — | falling |
| 64 | Caribbean | 1.0% | 2021 | — | falling |
| 65 | Mexico | 1.0% | 2021 | — | rising |
| 66 | Ethiopia | 0.9% | 2021 | — | rising |
| 67 | Guatemala | 0.8% | 2021 | — | rising |
| 68 | Japan | 0.8% | 2021 | — | volatile |
| 69 | Australia and New Zealand | 0.8% | 2021 | — | falling |
| 70 | Australia | 0.7% | 2021 | — | falling |
| 71 | Central African Republic | 0.7% | 2021 | — | rising |
| 72 | Morocco | 0.7% | 2021 | — | rising |
| 73 | Kenya | 0.7% | 2021 | — | rising |
| 74 | Costa Rica | 0.6% | 2021 | — | rising |
| 75 | Myanmar | 0.6% | 2021 | — | volatile |
| 76 | Belize | 0.6% | 2021 | — | rising |
| 77 | Lithuania | 0.5% | 2021 | — | volatile |
| 78 | Zambia | 0.4% | 2021 | — | flat |
| 79 | Sierra Leone | 0.4% | 2021 | — | volatile |
| 80 | South Africa | 0.4% | 2021 | — | flat |
| 81 | Thailand | 0.4% | 2021 | — | falling |
| 82 | Paraguay | 0.4% | 2021 | — | rising |
| 83 | Bangladesh | 0.4% | 2021 | — | falling |
| 84 | Denmark | 0.4% | 2021 | — | falling |
| 85 | Malaysia | 0.4% | 2021 | — | rising |
| 86 | Algeria | 0.4% | 2021 | — | falling |
| 87 | Eswatini | 0.3% | 2021 | — | volatile |
| 88 | Suriname | 0.3% | 2021 | — | rising |
| 89 | Latvia | 0.3% | 2021 | — | falling |
| 90 | Ukraine | 0.3% | 2021 | — | rising |
| 91 | Romania | 0.3% | 2021 | — | falling |
| 92 | Kazakhstan | 0.3% | 2021 | — | falling |
| 93 | Poland | 0.3% | 2021 | — | flat |
| 94 | Uzbekistan | 0.3% | 2021 | — | falling |
| 95 | Tunisia | 0.3% | 2021 | — | volatile |
| 96 | Bahamas | 0.3% | 2021 | — | rising |
| 97 | France | 0.2% | 2021 | — | volatile |
| 98 | Azerbaijan | 0.2% | 2021 | — | rising |
| 99 | Ghana | 0.2% | 2021 | — | rising |
| 100 | Slovakia | 0.2% | 2021 | — | volatile |
| 101 | North Macedonia | 0.2% | 2021 | — | volatile |
| 102 | Burundi | 0.2% | 2021 | — | volatile |
| 103 | Switzerland | 0.2% | 2021 | — | falling |
| 104 | Turkmenistan | 0.2% | 2021 | — | rising |
| 105 | Austria | 0.2% | 2021 | — | volatile |
| 106 | Syria | 0.2% | 2021 | — | falling |
| 106 | Syrian Arab Republic | 0.2% | 2021 | — | falling |
| 108 | Pakistan | 0.1% | 2021 | — | falling |
| 109 | Democratic People's Republic of Korea | 0.1% | 2021 | — | volatile |
| 110 | Philippines | 0.1% | 2021 | — | falling |
| 111 | Iran (Islamic Republic of) | 0.1% | 2021 | — | flat |
| 112 | Bulgaria | 0.1% | 2021 | — | volatile |
| 113 | Montenegro | 0.1% | 2021 | — | rising |
| 114 | Senegal | 0.1% | 2021 | — | rising |
| 115 | Haiti | 0.1% | 2021 | — | volatile |
| 116 | Spain | 0.1% | 2021 | — | falling |
| 117 | Chad | 0.1% | 2021 | — | rising |
| 118 | Italy | 0.1% | 2021 | — | volatile |
| 119 | Mauritania | 0.1% | 2021 | — | falling |
| 120 | Laos | 0.1% | 2021 | — | falling |
| 120 | Lao People's Democratic Republic | 0.1% | 2021 | — | falling |
| 122 | Uganda | 0.0% | 2021 | — | flat |
| 123 | Iraq | 0.0% | 2021 | — | volatile |
| 124 | Germany | 0.0% | 2021 | — | falling |
| 125 | Namibia | 0.0% | 2021 | — | volatile |
| 126 | Moldova | 0.0% | 2021 | — | rising |
| 126 | Republic of Moldova | 0.0% | 2021 | — | rising |
| 128 | Israel | 0.0% | 2021 | — | volatile |
| 129 | Albania | 0.0% | 2021 | — | volatile |
| 130 | Greece | 0.0% | 2021 | — | volatile |
| 131 | Portugal | 0.0% | 2021 | — | volatile |
| 132 | Hungary | 0.0% | 2021 | — | falling |
| 133 | Cambodia | 0.0% | 2021 | — | falling |
| 134 | Estonia | 0.0% | 2021 | — | volatile |
| 135 | Uruguay | 0.0% | 2021 | — | volatile |
| 136 | Djibouti | 0.0% | 2021 | — | volatile |
| 137 | Bosnia and Herzegovina | 0.0% | 2021 | — | volatile |
| 138 | Armenia | 0.0% | 2021 | — | rising |
| 139 | Dominican Republic | 0.0% | 2021 | — | volatile |
| 140 | Afghanistan | 0.0% | 2021 | — | falling |
| 141 | Croatia | 0.0% | 2021 | — | volatile |
Regions and income groups
Aggregates are excluded from the country ranking above so that a region can never outrank a country.
- Middle Africa 4.8%
- Eastern Africa 4.3%
- Sub-Saharan Africa 3.6%
- Northern America 3.4%
- Least Developed Countries (LDCs) 3.4%
- Oceania (exc. Australia and New Zealand) 3.0%
- Africa 2.8%
- Americas 2.7%
- United States of America 2.6%
- Europe and Northern America 2.5%
- Eastern Asia 2.3%
- Southern Africa 2.3%
- Developed regions (Europe, Cyprus, Israel, Northern America, Japan, Australia & New Zealand) 2.2%
- Northern Europe 2.1%
- World 2.1%
- Developing regions 2.1%
- South America 2.0%
- Eastern and South-Eastern Asia 1.9%
- Latin America and the Caribbean 1.9%
- Small island developing States (SIDS) 1.9%
- Eastern Europe 1.9%
- Europe 1.8%
- Landlocked developing countries (LLDCs) 1.6%
- Western Africa 1.6%
- Asia 1.5%
- Central America 1.1%
- South-Eastern Asia 1.1%
- Southern Asia 0.9%
- Oceania 0.9%
- Central and Southern Asia 0.8%
- Central Asia 0.6%
- Northern Africa and Western Asia 0.6%
- Northern Africa 0.6%
- Western Europe 0.2%
- Southern Europe 0.1%