City report · Anambra, Nigeria
Nnewi Air quality today
Air quality in Nnewi currently reads AQI 93 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 93
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 31.7
- tree cover
- 28.9%
- trees in this area
- 90.8K
- more trees needed
- 3.5K
Measured across a 2 km radius around Nnewi, Anambra, Nigeria (12.57 km²), from a satellite image of Feb 5, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Nnewi · AQI 93 (Moderate)
Nnewi's tree count comes to 90,792 trees across 12.57 km², 1 points below the 30% tree-cover level considered healthy for this area, so roughly 3,456 more trees would close the gap.
Air quality detail
Air quality in Nnewi today: AQI 93, Moderate
Main pollutant: PM2.5 · Observed Nov 10, 16:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 145 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 4 station cities within 145 km, e.g. Nsukka and Port Harcourt
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
31.7
PM10
20.0
NO₂
2.2
O₃
97.0
SO₂
1.0
CO
307.0
- 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 Nnewi's daily AQI at 86 on average, from 76 on Nov 10 to an hourly peak of 143 on Nov 7.
Where Nnewi stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Nnewi: Below target
28.9% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
90,792
Target trees
94,248
More trees needed
3,456
CO₂ if planted / yr
76.0 t
Deforestation · 2001–2025
How much forest has Nnewi lost?
Since 2001, the area within 10 km of Nnewi has lost about 50 hectares of forest (about 70 football pitches): 15% of the forest it had in 2000. Most of it (93%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from January 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 50 haabout 70 football pitches
- Share of its forest
- 15%of what there was in 2000
- Cleared for good
- 47 hadeforestation: turned into farms, mines or towns
The worst year was 2010, when about 10 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 | 6 ha | under 1 ha | 7 ha |
| 2002 | under 1 ha | under 1 ha | 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | 2 ha | under 1 ha | 2 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | 2 ha | under 1 ha | 2 ha |
| 2007 | 3 ha | under 1 ha | 4 ha |
| 2008 | 1 ha | under 1 ha | 1 ha |
| 2009 | 4 ha | under 1 ha | 5 ha |
| 2010 | 9 ha | under 1 ha | 10 ha |
| 2011 | 4 ha | under 1 ha | 4 ha |
| 2012 | under 1 ha | under 1 ha | 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | 1 ha |
| 2015 | 2 ha | under 1 ha | 2 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | 4 ha | under 1 ha | 4 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 | 3 ha | under 1 ha | 3 ha |
What is causing deforestation around Nnewi?
- Towns and roadscleared for good78% · 39 ha
- Farms, pasture and plantationscleared for good15% · 8 ha
- Unknown causescause unknown6.4% · 3 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
- 22,600 ha
- Forest in 2020
- 22,600 ha
- Overall change
- +45 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Nnewi stayed about the same size, at about 22,600 hectares: new forest grew on about 460 hectares, and about 415 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 Nnewi
What is the air quality (AQI) in Nnewi right now?
The latest reading for Nnewi shows an AQI of 93 (Moderate), observed Nov 10, 16:00 local time via Open-Meteo / CAMS, corrected with 4 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 Nnewi today?
At AQI 93 (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 Nnewi been like this week?
Over the last 7 days, the CAMS air-quality model put Nnewi's daily AQI at 86 on average, from 76 on Nov 10 to an hourly peak of 143 on Nov 7. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Nnewi lost since 2001?
Since 2001, the area within 10 km of Nnewi has lost about 50 hectares of forest (about 70 football pitches): 15% of the forest it had in 2000. Most of it (93%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Nnewi stayed about the same size, at about 22,600 hectares: new forest grew on about 460 hectares, and about 415 hectares were lost.
What is the tree count in Nnewi?
Nnewi has an estimated 90,792 trees across the 12.57 km² measured — 28.9% tree cover, 1 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Nnewi need?
Nnewi needs roughly 3,456 more trees to close a 1-point shortfall against its 30% tree-cover target — about 76.0 t of extra CO₂ absorbed per year once grown.
How are Nnewi'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 Nnewi; the tree count is an estimate derived from that cover.
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