City report · Oyo State, Nigeria
Iseyin Air quality today
Air quality in Iseyin currently reads AQI 71 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 71
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 20.1
- tree cover
- 9.3%
- trees in this area
- 29.2K
- more trees needed
- 65.0K
Measured across a 2 km radius around Iseyin, Oyo, Nigeria (12.57 km²), from a satellite image of Jan 24, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Iseyin · AQI 71 (Moderate)
Iseyin's tree count comes to 29,217 trees across 12.57 km², 21 points below the 30% tree-cover level considered healthy for this area, so roughly 65,031 more trees would close the gap.
Air quality detail
Air quality in Iseyin today: AQI 71, Moderate
Main pollutant: PM2.5 · Observed Nov 10, 16:00 local time via Open-Meteo / CAMS, corrected with 5 ground-station cities within 165 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 5 station cities within 165 km, e.g. Ibadan and Ota
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
20.1
PM10
20.5
NO₂
0.8
O₃
81.0
SO₂
0.6
CO
212.0
- 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 Iseyin's daily AQI at 75 on average, from 65 on Nov 10 to an hourly peak of 119 on Nov 4.
Where Iseyin stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Iseyin: Critically low
9.3% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
29,217
Target trees
94,248
More trees needed
65,031
CO₂ if planted / yr
1,431 t
Deforestation · 2001–2025
How much forest has Iseyin lost?
Since 2001, the area within 10 km of Iseyin has lost about 62 hectares of forest (about 86 football pitches): 21% 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 in the city center.
- Forest lost since 2001
- 62 haabout 86 football pitches
- Share of its forest
- 21%of what there was in 2000
- Cleared for good
- 62 hadeforestation: turned into farms, mines or towns
The worst year was 2017, when about 18 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 | 2 ha | under 1 ha | 2 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | 2 ha | under 1 ha | 2 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | 3 ha | under 1 ha | 3 ha |
| 2008 | 4 ha | under 1 ha | 4 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | 2 ha | under 1 ha | 2 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 | 3 ha | under 1 ha | 3 ha |
| 2016 | 5 ha | under 1 ha | 5 ha |
| 2017 | 18 ha | under 1 ha | 18 ha |
| 2018 | 2 ha | under 1 ha | 2 ha |
| 2019 | 4 ha | under 1 ha | 4 ha |
| 2020 | 4 ha | under 1 ha | 4 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | 1 ha | under 1 ha | 1 ha |
| 2024 | 3 ha | under 1 ha | 3 ha |
| 2025 | 5 ha | under 1 ha | 5 ha |
What is causing deforestation around Iseyin?
- Farms, pasture and plantationscleared for good91% · 56 ha
- Towns and roadscleared for good8.8% · 5 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
- 8,530 ha
- Forest in 2020
- 7,580 ha
- Overall change
- −951 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Iseyin shrank from about 8,530 hectares to 7,580 hectares, a net loss of about 951 hectares (−11%). New forest grew on about 219 hectares, but 1,170 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 Iseyin
What is the air quality (AQI) in Iseyin right now?
The latest reading for Iseyin shows an AQI of 71 (Moderate), observed Nov 10, 16:00 local time via Open-Meteo / CAMS, corrected with 5 ground-station cities within 165 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 Iseyin today?
At AQI 71 (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 Iseyin been like this week?
Over the last 7 days, the CAMS air-quality model put Iseyin's daily AQI at 75 on average, from 65 on Nov 10 to an hourly peak of 119 on Nov 4. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Iseyin lost since 2001?
Since 2001, the area within 10 km of Iseyin has lost about 62 hectares of forest (about 86 football pitches): 21% of the forest it had in 2000. Most of it (over 99%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Comparing satellite maps from 2000 and 2020, the forest around Iseyin shrank from about 8,530 hectares to 7,580 hectares, a net loss of about 951 hectares (−11%). New forest grew on about 219 hectares, but 1,170 hectares were lost.
What is the tree count in Iseyin?
Iseyin has an estimated 29,217 trees across the 12.57 km² measured — 9.3% tree cover, 21 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Iseyin need?
Iseyin needs roughly 65,031 more trees to close a 21-point shortfall against its 30% tree-cover target — about 1,431 t of extra CO₂ absorbed per year once grown.
How are Iseyin'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 Iseyin; the tree count is an estimate derived from that cover.
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