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 LatestYear 10-year changeTrend
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.

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Lake water quality trophic state by country. Statizoid, drawing on United Nations Statistics Division, SDG Global Database. Retrieved 30 September 2026, from https://environment.statizoid.com/stat/lake-water-quality-trophic-state-percent/

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About this data

Indicator
Lake water quality trophic state (%)
Unit
%
Source
United Nations Statistics Division, SDG Global Database
Licence
UN SDG Global Database (open, attribution requested)
Coverage
179 places, 895 data points, 2017–2021
Last refreshed