City report · Bengo, Angola
Calumbo Air quality today
Air quality in Calumbo currently reads AQI 54 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 54
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 11.8
- tree cover
- 28.1%
- trees in this area
- 85.8K
- more trees needed
- 5.8K
Measured across a 2 km radius around Viana, Angola (12.57 km²), from a satellite image of Sep 1, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Calumbo · AQI 54 (Moderate)
Calumbo's tree count comes to 85,807 trees across 12.22 km² of land, 2 points below the 30% tree-cover level considered healthy for this area, so roughly 5,802 more trees would close the gap.
Air quality detail
Air quality in Calumbo today: AQI 54, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 11:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
11.8
PM10
16.0
NO₂
1.4
O₃
86.0
SO₂
3.9
CO
124.0
- 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 Calumbo's daily AQI at 51 on average, from 39 on Nov 10 to an hourly peak of 71 on Nov 6.
Where Calumbo stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Calumbo: Below target
28.1% tree cover against a 30% healthy-neighborhood target, across 12.22 km² of land.
Trees in this area
85,807
Target trees
91,609
More trees needed
5,802
CO₂ if planted / yr
127.6 t
Deforestation · 2001–2025
How much forest has Calumbo lost?
Since 2001, the area within 10 km of Calumbo has lost about 201 hectares of forest (about 280 football pitches): 2.3% of the forest it had in 2000. Most of it (62%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 201 haabout 280 football pitches
- Share of its forest
- 2.3%of what there was in 2000
- Cleared for good
- 124 hadeforestation: turned into farms, mines or towns
The worst year was 2003, when about 30 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 | 19 ha | 7 ha | 27 ha |
| 2002 | 15 ha | 5 ha | 20 ha |
| 2003 | 18 ha | 13 ha | 30 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | under 1 ha | under 1 ha | 1 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | 17 ha | 9 ha | 26 ha |
| 2008 | 3 ha | 2 ha | 5 ha |
| 2009 | 10 ha | 7 ha | 18 ha |
| 2010 | 8 ha | 2 ha | 10 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | 9 ha | 8 ha | 17 ha |
| 2013 | 5 ha | 5 ha | 10 ha |
| 2014 | 5 ha | 11 ha | 15 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | 2 ha | under 1 ha | 2 ha |
| 2017 | 7 ha | 8 ha | 15 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 | 2 ha | under 1 ha | 2 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 | 2 ha | under 1 ha | 2 ha |
What is causing deforestation around Calumbo?
- Farms, pasture and plantationscleared for good61% · 123 ha
- Storms, floods and other natural causescan grow back34% · 68 ha
- Unknown causescause unknown4.8% · 10 ha
Also: towns and roads, mining and energy.
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
- 512 ha
- Forest in 2020
- 587 ha
- Overall change
- +75 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Calumbo grew from about 512 hectares to 587 hectares, a net gain of about 75 hectares (+15%). New forest grew on about 172 hectares, while 97 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
In the same region
Measured cities near Calumbo
Same 2 km radius, same index — so they compare directly.
- Zango15.5 km
Angola
- Tree cover
- 2%
- Air quality
- 44
- Camama28.9 km
Angola
- Tree cover
- 1%
- Air quality
- 53
- Mulenvos32.5 km
Angola
- Tree cover
- 1%
- Air quality
- 53
- Talatona36.2 km
Angola
- Tree cover
- 10%
- Air quality
- 53
- Kikolo41.7 km
Angola
- Tree cover
- 2%
- Air quality
- 53
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Frequently asked
Questions about Calumbo
What is the air quality (AQI) in Calumbo right now?
The latest reading for Calumbo shows an AQI of 54 (Moderate), observed Nov 11, 11:00 local time via Open-Meteo / CAMS, 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 Calumbo today?
At AQI 54 (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 Calumbo been like this week?
Over the last 7 days, the CAMS air-quality model put Calumbo's daily AQI at 51 on average, from 39 on Nov 10 to an hourly peak of 71 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 Calumbo lost since 2001?
Since 2001, the area within 10 km of Calumbo has lost about 201 hectares of forest (about 280 football pitches): 2.3% of the forest it had in 2000. Most of it (62%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Comparing satellite maps from 2000 and 2020, the forest around Calumbo grew from about 512 hectares to 587 hectares, a net gain of about 75 hectares (+15%). New forest grew on about 172 hectares, while 97 hectares were lost.
What is the tree count in Calumbo?
Calumbo has an estimated 85,807 trees across the 12.22 km² of land measured — 28.1% tree cover, 2 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Calumbo need?
Calumbo needs roughly 5,802 more trees to close a 2-point shortfall against its 30% tree-cover target — about 127.6 t of extra CO₂ absorbed per year once grown.
How are Calumbo'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 Viana; the tree count is an estimate derived from that cover.
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