City report · Osun State, Nigeria
Gbongan Air quality today
Air quality in Gbongan currently reads AQI 65 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 65
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 17.2
- tree cover
- 39.6%
- trees in this area
- 124K
- more trees needed
- 0
Measured across a 2 km radius around Gbongan, Osun, Nigeria (12.57 km²), from a satellite image of Jan 24, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Gbongan · AQI 65 (Moderate)
Gbongan's tree count comes to 124,407 trees across 12.57 km², already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Gbongan today: AQI 65, Moderate
Main pollutant: PM2.5 · Observed Nov 10, 16:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 145 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 145 km, e.g. Ibadan and Ijede
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
17.2
PM10
26.8
NO₂
2.3
O₃
105.0
SO₂
0.8
CO
294.0
- 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 Gbongan's daily AQI at 82 on average, from 72 on Nov 10 to an hourly peak of 152 on Nov 6.
Where Gbongan stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Gbongan: Healthy tree cover
39.6% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
124,407
Target trees
124,407
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Gbongan lost?
Since 2001, the area within 10 km of Gbongan has lost about 1,420 hectares of forest (about 2,000 football pitches): 5.8% of the forest it had in 2000. Most of it (over 99%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from January 2017 of a 5 × 5 km area about 7 km west of the city center.
- Forest lost since 2001
- 1,420 haabout 2,000 football pitches
- Share of its forest
- 5.8%of what there was in 2000
- Cleared for good
- 1,420 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 103 hectares a year in 2021–2025, down from 139 hectares a year in 2016–2020. The worst year was 2017, when about 251 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 | 3 ha | under 1 ha | 3 ha |
| 2002 | 5 ha | under 1 ha | 5 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | 1 ha | under 1 ha | 1 ha |
| 2005 | 12 ha | under 1 ha | 12 ha |
| 2006 | 4 ha | under 1 ha | 4 ha |
| 2007 | 14 ha | under 1 ha | 14 ha |
| 2008 | 11 ha | under 1 ha | 11 ha |
| 2009 | 13 ha | under 1 ha | 13 ha |
| 2010 | 17 ha | under 1 ha | 17 ha |
| 2011 | 8 ha | under 1 ha | 8 ha |
| 2012 | 2 ha | under 1 ha | 2 ha |
| 2013 | 41 ha | under 1 ha | 41 ha |
| 2014 | 52 ha | under 1 ha | 52 ha |
| 2015 | 27 ha | under 1 ha | 28 ha |
| 2016 | 51 ha | under 1 ha | 51 ha |
| 2017 | 251 ha | under 1 ha | 251 ha |
| 2018 | 78 ha | under 1 ha | 78 ha |
| 2019 | 203 ha | 1 ha | 204 ha |
| 2020 | 110 ha | under 1 ha | 110 ha |
| 2021 | 113 ha | under 1 ha | 113 ha |
| 2022 | 38 ha | under 1 ha | 38 ha |
| 2023 | 91 ha | under 1 ha | 91 ha |
| 2024 | 87 ha | under 1 ha | 87 ha |
| 2025 | 184 ha | 2 ha | 186 ha |
What is causing deforestation around Gbongan?
- Farms, pasture and plantationscleared for good90% · 1,280 ha
- Towns and roadscleared for good9.9% · 141 ha
Also: 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
- 24,500 ha
- Forest in 2020
- 24,200 ha
- Overall change
- −227 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Gbongan stayed about the same size, at about 24,200 hectares: new forest grew on about 506 hectares, and about 733 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 Gbongan
What is the air quality (AQI) in Gbongan right now?
The latest reading for Gbongan shows an AQI of 65 (Moderate), observed Nov 10, 16:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 145 km, US EPA index. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Gbongan today?
At AQI 65 (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 Gbongan been like this week?
Over the last 7 days, the CAMS air-quality model put Gbongan's daily AQI at 82 on average, from 72 on Nov 10 to an hourly peak of 152 on Nov 6. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Gbongan lost since 2001?
Since 2001, the area within 10 km of Gbongan has lost about 1,420 hectares of forest (about 2,000 football pitches): 5.8% of the forest it had in 2000. Most of it (over 99%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Forest loss is slowing down: about 103 hectares a year in 2021–2025, down from 139 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Gbongan stayed about the same size, at about 24,200 hectares: new forest grew on about 506 hectares, and about 733 hectares were lost.
What is the tree count in Gbongan?
Gbongan has an estimated 124,407 trees across the 12.57 km² measured — 39.6% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Gbongan need?
Gbongan has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Gbongan's air quality and tree cover measured?
Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors. 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 Gbongan; the tree count is an estimate derived from that cover.
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