Marine waters affected by eutrophication by country
Countries reporting
31
Highest
12,386 Square kilometre
Denmark
Lowest
0 Square kilometre
Czechia
Median
3 Square kilometre
Years covered
25
2001–2025
Data points
800
What the numbers show
Marine waters affected by eutrophication is currently reported for 31 countries. The highest value is 12,386 Square kilometre in Denmark; the lowest is 0 Square kilometre in Czechia.
The median across all reporting countries is 3 Square kilometre, and the mean is 758.52 Square kilometre.
Over the past decade 6 countries rose and 16 fell. The largest increase was in Ireland (up 3,600.0%), and the largest decrease in Iceland (down 100.0%).
Marine waters affected by eutrophication: full country ranking
| # | Country | Latest | Year | 10-year change | Trend |
|---|---|---|---|---|---|
| 1 | Denmark | 12,386 Square kilometre | 2025 | up 20.8% | volatile |
| 2 | France | 4,289 Square kilometre | 2025 | up 1,636.4% | volatile |
| 3 | Spain | 3,011 Square kilometre | 2025 | down 5.5% | volatile |
| 4 | Norway | 1,575 Square kilometre | 2025 | up 1,160.0% | volatile |
| 5 | Portugal | 699 Square kilometre | 2025 | down 40.7% | volatile |
| 6 | Finland | 650 Square kilometre | 2025 | up 177.8% | volatile |
| 7 | United Kingdom | 529 Square kilometre | 2025 | down 43.7% | volatile |
| 8 | Estonia | 137 Square kilometre | 2025 | up 341.9% | volatile |
| 9 | Sweden | 117 Square kilometre | 2025 | unchanged | volatile |
| 10 | Ireland | 37 Square kilometre | 2025 | up 3,600.0% | volatile |
| 11 | Germany | 34 Square kilometre | 2025 | down 77.0% | volatile |
| 12 | Italy | 27 Square kilometre | 2025 | down 74.8% | volatile |
| 13 | Croatia | 11 Square kilometre | 2025 | down 47.6% | volatile |
| 14 | Poland | 5 Square kilometre | 2025 | down 64.3% | volatile |
| 15 | Belgium | 3 Square kilometre | 2025 | — | volatile |
| 15 | Netherlands | 3 Square kilometre | 2025 | down 94.4% | volatile |
| 17 | Latvia | 1 Square kilometre | 2025 | down 80.0% | volatile |
| 18 | Iceland | 0 Square kilometre | 2025 | down 100.0% | volatile |
| 18 | Lithuania | 0 Square kilometre | 2025 | down 100.0% | volatile |
| 18 | Luxembourg | 0 Square kilometre | 2025 | — | flat |
| 18 | Austria | 0 Square kilometre | 2025 | — | flat |
| 18 | Malta | 0 Square kilometre | 2025 | — | volatile |
| 18 | Hungary | 0 Square kilometre | 2025 | — | flat |
| 18 | Cyprus | 0 Square kilometre | 2025 | down 100.0% | volatile |
| 18 | Greece | 0 Square kilometre | 2025 | down 100.0% | volatile |
| 18 | Switzerland | 0 Square kilometre | 2025 | — | flat |
| 18 | Romania | 0 Square kilometre | 2025 | down 100.0% | volatile |
| 18 | Slovakia | 0 Square kilometre | 2025 | — | flat |
| 18 | Slovenia | 0 Square kilometre | 2025 | down 100.0% | volatile |
| 18 | Bulgaria | 0 Square kilometre | 2025 | down 100.0% | volatile |
| 18 | Czechia | 0 Square kilometre | 2025 | — | flat |