Mariehamn
2 km around Mariehamn
Air quality now
AQI 39
58.2%
tree cover
Healthy tree cover
Europe · air quality report · 1 city
Aland Islands air quality today The AQI right now, city by city
Airleaf measures 1 city in the Aland Islands. Mariehamn reads AQI 39 right now.
- cities measured
- 1
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Aland Islands
Air quality in Mariehamn right now
Good
Deforestation · 2001–2025
How much forest has the Aland Islands lost?
Since 2001, the Aland Islands has lost about 13,200 hectares of forest (about 19,000 football pitches): 21% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 332 hectares (2.5%) was deforestation: forest cleared for good for farms, mines or towns.
- Forest lost since 2001
- 13,200 haabout 19,000 football pitches
- Share of its forest
- 21%of what there was in 2000
- Cleared for good
- 332 hadeforestation: turned into farms, mines or towns
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 13 ha | 286 ha | 299 ha |
| 2002 | 6 ha | 177 ha | 183 ha |
| 2003 | 2 ha | 164 ha | 166 ha |
| 2004 | 12 ha | 508 ha | 520 ha |
| 2005 | 26 ha | 480 ha | 506 ha |
| 2006 | under 1 ha | 62 ha | 62 ha |
| 2007 | 4 ha | 178 ha | 182 ha |
| 2008 | 26 ha | 914 ha | 940 ha |
| 2009 | 12 ha | 388 ha | 400 ha |
| 2010 | 30 ha | 412 ha | 442 ha |
| 2011 | 14 ha | 372 ha | 385 ha |
| 2012 | 20 ha | 457 ha | 477 ha |
| 2013 | 13 ha | 366 ha | 379 ha |
| 2014 | 17 ha | 361 ha | 378 ha |
| 2015 | 2 ha | 385 ha | 387 ha |
| 2016 | 25 ha | 482 ha | 507 ha |
| 2017 | 11 ha | 537 ha | 548 ha |
| 2018 | 16 ha | 433 ha | 449 ha |
| 2019 | 22 ha | 1,690 ha | 1,710 ha |
| 2020 | 11 ha | 500 ha | 511 ha |
| 2021 | 16 ha | 950 ha | 966 ha |
| 2022 | 15 ha | 849 ha | 864 ha |
| 2023 | 5 ha | 794 ha | 799 ha |
| 2024 | 6 ha | 688 ha | 693 ha |
| 2025 | 10 ha | 483 ha | 493 ha |
Forest loss has stayed about the same: about 763 hectares a year in 2021–2025, against 745 hectares a year in 2016–2020. The worst year was 2019, when about 1,710 hectares of forest were lost.
What is causing deforestation in the Aland Islands?
- Loggingcan grow back97% · 12,900 ha
- Towns and roadscleared for good1.5% · 202 ha
Also: farms, pasture and plantations, wildfires, unknown causes.
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
Source: Hansen/UMD/Google/USGS/NASA, Global Forest Change (GFC-2025-v1.13); causes: WRI/Google DeepMind drivers of forest loss; both CC BY 4.0, summed by Airleaf for each area. How it's measured
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Cleaner air at home in the Aland Islands
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Frequently asked
Air quality in the Aland Islands: your questions answered
What is the air quality in the Aland Islands today?
Airleaf measures 1 city in the Aland Islands. Mariehamn reads AQI 39 right now.
How much forest has the Aland Islands lost since 2001?
About 13,200 ha from 2001 to 2025, 21% of the forest it had in 2000, from the University of Maryland's yearly satellite maps of forest loss. 332 ha of it was cleared for good, for farms, mines or towns.
How does Airleaf measure air quality in the Aland Islands?
Each city's reading is the US EPA air quality index, from ground monitoring stations where one has reported recently nearby, and from the CAMS atmospheric model elsewhere; each city's report says which. Tree cover is measured over the same 2 km radius in every city, so the cities compare like for like.
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