City report · Kocaeli, Turkey
Gebze Air quality today
Air quality in Gebze currently reads AQI 78 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 78
Moderate
- PM2.5, fine particles (µg/m³)
- 23.5
- tree cover
- 11.7%
- trees in this area
- 36.8K
- more trees needed
- 57.5K
Measured across a 2 km radius around Gebze, Kocaeli, Türkiye (12.57 km²), from a satellite image of Sep 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Gebze · AQI 78 (Moderate)
Gebze's tree count comes to 36,757 trees across 12.57 km², 18 points below the 30% tree-cover level considered healthy for this area, so roughly 57,491 more trees would close the gap.
Air quality detail
Air quality in Gebze today: AQI 78, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 17:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Kocaeli Gebze, Turkey, 1 km away · median of 2 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
23.5
PM10
63.1
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Turkey National Air Quality Monitoring Network (Ulusal Hava Kalitesi İzleme Ağı)
- Outdoor exercise
- Fine for most people; unusually sensitive people should take long or hard exercise easier
- Windows
- Fine to open; close them if you are sensitive to pollution
- Mask
- Not needed for most people
- Air purifier
- Worth running if you are sensitive
Over the last 7 days, the CAMS air-quality model put Gebze's daily AQI at 78 on average, from 54 on Nov 6 to an hourly peak of 159 on Nov 10.
Where Gebze stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Gebze: Critically low
11.7% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
36,757
Target trees
94,248
More trees needed
57,491
CO₂ if planted / yr
1,265 t
Deforestation · 2001–2025
How much forest has Gebze lost?
Since 2001, the area within 10 km of Gebze has lost about 216 hectares of forest (about 300 football pitches): 21% of the forest it had in 2000. Most of it (75%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from July 2017 of a 5 × 5 km area about 7 km north of the city center.
- Forest lost since 2001
- 216 haabout 300 football pitches
- Share of its forest
- 21%of what there was in 2000
- Cleared for good
- 161 hadeforestation: turned into farms, mines or towns
The worst year was 2010, when about 48 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 | 4 ha | 6 ha | 9 ha |
| 2002 | 1 ha | under 1 ha | 2 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | 11 ha | 1 ha | 12 ha |
| 2005 | 3 ha | under 1 ha | 3 ha |
| 2006 | 5 ha | under 1 ha | 5 ha |
| 2007 | 7 ha | under 1 ha | 7 ha |
| 2008 | 10 ha | 2 ha | 12 ha |
| 2009 | 2 ha | under 1 ha | 2 ha |
| 2010 | 48 ha | under 1 ha | 48 ha |
| 2011 | 5 ha | 1 ha | 6 ha |
| 2012 | 6 ha | under 1 ha | 7 ha |
| 2013 | 1 ha | under 1 ha | 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | 1 ha | under 1 ha | 2 ha |
| 2017 | 23 ha | 3 ha | 25 ha |
| 2018 | 5 ha | under 1 ha | 6 ha |
| 2019 | 2 ha | 13 ha | 15 ha |
| 2020 | under 1 ha | under 1 ha | 2 ha |
| 2021 | 11 ha | 7 ha | 18 ha |
| 2022 | 4 ha | under 1 ha | 4 ha |
| 2023 | 4 ha | 10 ha | 14 ha |
| 2024 | 2 ha | 3 ha | 4 ha |
| 2025 | 5 ha | 4 ha | 9 ha |
What is causing deforestation around Gebze?
- Towns and roadscleared for good59% · 128 ha
- Loggingcan grow back17% · 36 ha
- Mining and energycleared for good13% · 27 ha
Also: wildfires, farms, pasture and plantations, unknown causes.
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
- 2,190 ha
- Forest in 2020
- 2,220 ha
- Overall change
- +31 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Gebze stayed about the same size, at about 2,220 hectares: new forest grew on about 189 hectares, and about 158 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 center, 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
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Frequently asked
Questions about Gebze
What is the air quality (AQI) in Gebze right now?
The latest reading for Gebze shows an AQI of 78 (Moderate), measured Nov 11, 17:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Kocaeli Gebze, Turkey, 1 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Gebze today?
At AQI 78 (Moderate): fine for most people; unusually sensitive people should take long or hard exercise easier. Windows: fine to open; close them if you are sensitive to pollution. Masks: not needed for most people. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Gebze been like this week?
Over the last 7 days, the CAMS air-quality model put Gebze's daily AQI at 78 on average, from 54 on Nov 6 to an hourly peak of 159 on Nov 10. On 1 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Gebze lost since 2001?
Since 2001, the area within 10 km of Gebze has lost about 216 hectares of forest (about 300 football pitches): 21% of the forest it had in 2000. Most of it (75%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Gebze stayed about the same size, at about 2,220 hectares: new forest grew on about 189 hectares, and about 158 hectares were lost.
What is the tree count in Gebze?
Gebze has an estimated 36,757 trees across the 12.57 km² measured — 11.7% tree cover, 18 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Gebze need?
Gebze needs roughly 57,491 more trees to close a 18-point shortfall against its 30% tree-cover target — about 1,265 t of extra CO₂ absorbed per year once grown.
How are Gebze's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Gebze, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. 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 Gebze; the tree count is an estimate derived from that cover.
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