Marine waters affected by eutrophication in Portugal
Portugal: Marine waters affected by eutrophication was 699 Square kilometre in 2025. ◆ Volatile
Marine waters affected by eutrophication in Portugal, 2001–2025
Source: Eurostat. Measured in Square kilometre.
Analysis
In 2025, marine waters affected by eutrophication in Portugal stood at 699 Square kilometre.
Compared with earlier readings it is down 22.7% on the previous year and down 40.7% over ten years.
Over the whole period, marine waters affected by eutrophication in Portugal peaked at 18,726 Square kilometre in 2003 and was at its lowest, 278 Square kilometre, in 2009.
Portugal ranks 5th of 40 countries on this measure, in the top quarter.
The series is highly variable year to year, so single readings are best treated with caution.
Marine waters affected by eutrophication in Portugal, year by year
| Year | Square kilometre | Change |
|---|---|---|
| 2001 | 4,347 Square kilometre | — |
| 2002 | 16,276 Square kilometre | +274.4% |
| 2003 | 18,726 Square kilometre | +15.1% |
| 2004 | 18,640 Square kilometre | -0.5% |
| 2005 | 15,171 Square kilometre | -18.6% |
| 2006 | 3,291 Square kilometre | -78.3% |
| 2007 | 860 Square kilometre | -73.9% |
| 2008 | 865 Square kilometre | +0.6% |
| 2009 | 278 Square kilometre | -67.9% |
| 2010 | 359 Square kilometre | +29.1% |
| 2011 | 421 Square kilometre | +17.3% |
| 2012 | 794 Square kilometre | +88.6% |
| 2013 | 624 Square kilometre | -21.4% |
| 2014 | 707 Square kilometre | +13.3% |
| 2015 | 1,179 Square kilometre | +66.8% |
| 2016 | 972 Square kilometre | -17.6% |
| 2017 | 992 Square kilometre | +2.1% |
| 2018 | 911 Square kilometre | -8.2% |
| 2019 | 535 Square kilometre | -41.3% |
| 2020 | 427 Square kilometre | -20.2% |
| 2021 | 604 Square kilometre | +41.5% |
| 2022 | 1,011 Square kilometre | +67.4% |
| 2023 | 900 Square kilometre | -11.0% |
| 2024 | 904 Square kilometre | +0.4% |
| 2025 | 699 Square kilometre | -22.7% |
Portugal compared with similar countries
- Portugal's 699 Square kilometre is above the median for Europe & Central Asia, which is 3 Square kilometre, 233.0× the median. (30 countries reporting)
- Portugal's 699 Square kilometre is above the median for high income countries, which is 3 Square kilometre, 233.0× the median. (31 countries reporting)
Biggest year-on-year movements
Years where Marine waters affected by eutrophication in Portugal changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 2002 | +274.4% | 4,347 Square kilometre | 16,276 Square kilometre |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 2000s | 8,717 Square kilometre | 278 Square kilometre | 18,726 Square kilometre | 9 |
| 2010s | 749.4 Square kilometre | 359 Square kilometre | 1,179 Square kilometre | 10 |
| 2020s | 757.5 Square kilometre | 427 Square kilometre | 1,011 Square kilometre | 6 |
Countries ranked near Portugal
More environment data for Portugal
- Historical exposure to drought — Land soil moisture anomaly -0.6043 Percentage change (2025)
- Historical exposure to drought — Cropland soil moisture anomaly -0.5127 Percentage change (2025)
- Standard Deviation, annual growth rate 0 % change on previous year (2025)
- Standard Deviation 0.44 °C (2025)
- Temperature change 2.15 °C (2025)
- Wood-based panels — Production, annual growth rate 3.41 % change on previous year (2024)
- Total greenhouse gas emissions excluding LULUCF (Mt CO2e), annual -3.29 % change on previous year (2024)
- Total greenhouse gas emissions excluding LULUCF (Mt CO2e), per unit 0 Mt CO2e per US$ of GDP (2024)
- Total greenhouse gas emissions excluding LULUCF (Mt CO2e), per capita 0 Mt CO2e per person (2024)
- Methane (CH4) emissions from Agriculture (Mt CO2e), annual growth rate 0.1607 % change on previous year (2024)
Frequently asked questions
- What is marine waters affected by eutrophication in Portugal?
- Marine waters affected by eutrophication in Portugal was 699 Square kilometre in 2025, according to Eurostat.
- What is the highest marine waters affected by eutrophication recorded in Portugal?
- The highest recorded value was 18,726 Square kilometre in 2003.
- What is the lowest marine waters affected by eutrophication recorded in Portugal?
- The lowest recorded value was 278 Square kilometre in 2009.
- How does Portugal rank for marine waters affected by eutrophication?
- Portugal ranks 5th out of 40 countries with data for 2025.
- Is marine waters affected by eutrophication rising or falling in Portugal?
- Over the last ten years it is down 40.7%. The long-run trend across the full record is volatile.
- Where does this Portugal data come from?
- The figures come from Eurostat, published as part of Marine waters affected by eutrophication. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 25 observations, free to reuse under CC BY 4.0 (Eurostat).