- Tree cover
- 3.0%
- Air quality
- 64Moderate
- Trees in this area
- 7.1K
- More trees needed
- 64.0K
- Area analyzed
- 9.48 km²land, in a 12.57 km² circle
- Satellite image
- Sep 21, 2026
Piraeus's tree count comes to 7,106 trees across 9.48 km² of land — 27 points below the 30% tree-cover level considered healthy for this area, meaning roughly 63,957 more trees would close the gap. Air quality currently reads AQI 64 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Tree cover detail
Tree cover in Piraeus: Critically low
3.0% tree cover against a 30% healthy-neighborhood target, across 9.48 km² of land.
Trees in this area
7,106
Target trees
71,063
More trees needed
63,957
CO₂ if planted / yr
1,407 t
Air quality detail
Air quality in Piraeus today: AQI 64, Moderate
Observed Oct 20, 00:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · PIREAUS-1, 300 m away · median of 3 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
16.0
PM10
39.0
NO₂
83.5
O₃
3.0
SO₂
9.0
CO
1850.0
Data: OpenAQ · EEA
Deforestation · 2001–2025
How much forest has Piraeus lost?
Since 2001, the area within 10 km of Piraeus has lost about 8 hectares of forest (about 11 football pitches): 2.4% of the forest it had in 2000. Most of it (85%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from July 2017 of a 5 × 5 km area in the city centre.
- Forest lost since 2001
- 8 haabout 11 football pitches
- Share of its forest
- 2.4%of what there was in 2000
- Cleared for good
- 7 hadeforestation: turned into farms, mines or towns
The worst year was 2002, when about 2 hectares of forest were lost.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | under 1 ha | under 1 ha | under 1 ha |
| 2002 | 2 ha | under 1 ha | 2 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | under 1 ha | 1 ha |
| 2005 | 1 ha | under 1 ha | 1 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | under 1 ha | under 1 ha | under 1 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Piraeus?
- Towns and roadscleared for good85% · 7 ha
- Unknown causescause unknown13% · 1 ha
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
Forest gained and lost, 2000–2020
- Forest in 2000
- 1,030 ha
- Forest in 2020
- 1,060 ha
- Overall change
- +32 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Piraeus grew from about 1,030 hectares to 1,060 hectares, a net gain of about 32 hectares (+3.1%). New forest grew on about 46 hectares, while 15 hectares were lost.
These 2000 and 2020 maps, from the University of Maryland, count any land with trees taller than 5 m as forest, including plantations and orchards. Forest that was cut or burned and had grown back by 2020 counts in both years, so the loss here is smaller than the yearly figures.
These figures cover everything within 10 km of the city centre, a wider area than the report above, because forest is usually lost at a city's edges.
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. Forest gained and lost 2000–2020: Potapov et al. 2022, UMD GLAD Global Land Cover and Land Use Change, CC BY 4.0. Images: contains modified Copernicus Sentinel data. How it's measured
In the same region
Measured cities near Piraeus
Same 2 km radius, same index — so they compare directly.
- Lárisa215.5 km
Greece
- Tree cover
- 9%
- Air quality
- 61
- Çiğli305.4 km
Turkey
- Tree cover
- 10%
- Air quality
- 63
- Thessaloníki306.3 km
Greece
- Tree cover
- 8%
- Air quality
- 52
- İzmir309.7 km
Turkey
- Tree cover
- 11%
- Air quality
- 78
- Bornova319.6 km
Turkey
- Tree cover
- 50%
- Air quality
- 65
Also compared:Piraeus vs Irákleion
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Frequently asked
Questions about Piraeus
What is the tree count in Piraeus?
Piraeus has an estimated 7,106 trees across the 9.48 km² of land measured — 3.0% tree cover, 27 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Piraeus need?
Piraeus needs roughly 63,957 more trees to close a 27-point shortfall against its 30% tree-cover target — about 1,407 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Piraeus right now?
The latest reading for Piraeus shows an AQI of 64 (Moderate), measured Oct 20, 00:00 local time by 3 ground monitoring stations via OpenAQ (the median of their readings; the nearest is PIREAUS-1, 300 m away). Unusually sensitive people should consider limiting long outdoor exertion.
How much forest has the area around Piraeus lost since 2001?
Since 2001, the area within 10 km of Piraeus has lost about 8 hectares of forest (about 11 football pitches): 2.4% of the forest it had in 2000. Most of it (85%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Piraeus grew from about 1,030 hectares to 1,060 hectares, a net gain of about 32 hectares (+3.1%). New forest grew on about 46 hectares, while 15 hectares were lost.
How is Piraeus's tree cover and air quality measured?
Tree cover is measured from Sentinel-2 L2A (ESA Copernicus) via Earth Search satellite imagery at 10 m detail across a 2 km radius around Piraeus; the tree count is an estimate derived from that cover. Air quality is measured by ground monitoring stations near Piraeus, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate.
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