City report · Abia State, Nigeria
Umuahia Air quality today
Air quality in Umuahia currently reads AQI 89 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 89
Moderate
- PM2.5, fine particles (µg/m³)
- 30.8
- tree cover
- 20.5%
- trees in this area
- 64.4K
- more trees needed
- 29.8K
Measured across a 2 km radius around Umu Obasi, Umuahia 440236, Abia, Nigeria (12.57 km²), from a satellite image of Jan 28, 2025. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Umuahia · AQI 89 (Moderate)
Umuahia's tree count comes to 64,403 trees across 12.57 km², 10 points below the 30% tree-cover level considered healthy for this area, so roughly 29,845 more trees would close the gap.
Air quality detail
Air quality in Umuahia today: AQI 89, Moderate
Main pollutant: PM2.5 · Observed Nov 10, 16:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 125 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 3 station cities within 125 km, e.g. Okrika and Port Harcourt
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
30.8
PM10
17.2
NO₂
2.0
O₃
70.0
SO₂
1.3
CO
366.0
- 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 Umuahia's daily AQI at 80 on average, from 77 on Nov 6 to an hourly peak of 125 on Nov 9.
Where Umuahia stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Umuahia: Below target
20.5% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
64,403
Target trees
94,248
More trees needed
29,845
CO₂ if planted / yr
656.6 t
Deforestation · 2001–2025
How much forest has Umuahia lost?
Since 2001, the area within 10 km of Umuahia has lost about 836 hectares of forest (about 1,200 football pitches): 12% of the forest it had in 2000. Most of it (89%) 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 northeast of the city center.
- Forest lost since 2001
- 836 haabout 1,200 football pitches
- Share of its forest
- 12%of what there was in 2000
- Cleared for good
- 745 hadeforestation: turned into farms, mines or towns
The worst year was 2001, when about 197 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 | 185 ha | 12 ha | 197 ha |
| 2002 | 20 ha | 8 ha | 28 ha |
| 2003 | 41 ha | 18 ha | 59 ha |
| 2004 | 8 ha | under 1 ha | 9 ha |
| 2005 | 13 ha | 1 ha | 14 ha |
| 2006 | 1 ha | under 1 ha | 1 ha |
| 2007 | 16 ha | 2 ha | 18 ha |
| 2008 | 2 ha | under 1 ha | 2 ha |
| 2009 | 31 ha | under 1 ha | 31 ha |
| 2010 | 17 ha | 1 ha | 18 ha |
| 2011 | 8 ha | 7 ha | 15 ha |
| 2012 | 30 ha | 4 ha | 34 ha |
| 2013 | 34 ha | 2 ha | 36 ha |
| 2014 | 39 ha | under 1 ha | 39 ha |
| 2015 | 13 ha | under 1 ha | 13 ha |
| 2016 | 6 ha | under 1 ha | 7 ha |
| 2017 | 56 ha | 14 ha | 70 ha |
| 2018 | 45 ha | 10 ha | 55 ha |
| 2019 | 10 ha | 2 ha | 11 ha |
| 2020 | 16 ha | under 1 ha | 17 ha |
| 2021 | 31 ha | under 1 ha | 32 ha |
| 2022 | 21 ha | 2 ha | 23 ha |
| 2023 | 20 ha | 2 ha | 22 ha |
| 2024 | 40 ha | 2 ha | 41 ha |
| 2025 | 43 ha | 2 ha | 45 ha |
What is causing deforestation around Umuahia?
- Farms, pasture and plantationscleared for good70% · 587 ha
- Towns and roadscleared for good18% · 151 ha
- Shifting farmingcan grow back11% · 89 ha
Also: mining and energy, 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
- 21,400 ha
- Forest in 2020
- 20,600 ha
- Overall change
- −728 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Umuahia shrank from about 21,400 hectares to 20,600 hectares, a net loss of about 728 hectares (−3.4%). New forest grew on about 1,140 hectares, but 1,870 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 Umuahia
What is the air quality (AQI) in Umuahia right now?
The latest reading for Umuahia shows an AQI of 89 (Moderate), observed Nov 10, 16:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 125 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 Umuahia today?
At AQI 89 (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 Umuahia been like this week?
Over the last 7 days, the CAMS air-quality model put Umuahia's daily AQI at 80 on average, from 77 on Nov 6 to an hourly peak of 125 on Nov 9. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Umuahia lost since 2001?
Since 2001, the area within 10 km of Umuahia has lost about 836 hectares of forest (about 1,200 football pitches): 12% of the forest it had in 2000. Most of it (89%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Comparing satellite maps from 2000 and 2020, the forest around Umuahia shrank from about 21,400 hectares to 20,600 hectares, a net loss of about 728 hectares (−3.4%). New forest grew on about 1,140 hectares, but 1,870 hectares were lost.
What is the tree count in Umuahia?
Umuahia has an estimated 64,403 trees across the 12.57 km² measured — 20.5% tree cover, 10 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Umuahia need?
Umuahia needs roughly 29,845 more trees to close a 10-point shortfall against its 30% tree-cover target — about 656.6 t of extra CO₂ absorbed per year once grown.
How are Umuahia'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 Umu Obasi; the tree count is an estimate derived from that cover.
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