City report · Huambo, Angola
Catchiungo Air quality today
Air quality in Catchiungo currently reads AQI 36 (Good): Air quality is satisfactory for everyone.
AQI 36
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 6.9
- tree cover
- 10.0%
- trees in this area
- 31.4K
- more trees needed
- 62.8K
Measured across a 2 km radius around Catchiungo, Angola (12.57 km²), from a satellite image of Oct 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Catchiungo · AQI 36 (Good)
Catchiungo's tree count comes to 31,416 trees across 12.57 km², 20 points below the 30% tree-cover level considered healthy for this area, so roughly 62,832 more trees would close the gap.
Air quality detail
Air quality in Catchiungo today: AQI 36, Good
Main pollutant: PM2.5 · Observed Nov 10, 19:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Air quality is satisfactory for everyone.
PM2.5
6.9
PM10
7.1
NO₂
4.2
O₃
53.0
SO₂
0.4
CO
175.0
- Outdoor exercise
- A good day to be active outside
- Windows
- Open them to air the house
- Mask
- Not needed
- Air purifier
- Not needed
Over the last 7 days, the CAMS air-quality model put Catchiungo's daily AQI at 43 on average, from 25 on Nov 10 to an hourly peak of 66 on Nov 5.
Where Catchiungo stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Catchiungo: Critically low
10.0% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
31,416
Target trees
94,248
More trees needed
62,832
CO₂ if planted / yr
1,382 t
Deforestation · 2001–2025
How much forest has Catchiungo lost?
Since 2001, the area within 10 km of Catchiungo has lost about 658 hectares of forest (about 920 football pitches): 55% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 155 hectares (24%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from September 2017 of a 5 × 5 km area about 6 km north of the city center.
- Forest lost since 2001
- 658 haabout 920 football pitches
- Share of its forest
- 55%of what there was in 2000
- Cleared for good
- 155 hadeforestation: turned into farms, mines or towns
Forest loss has stayed about the same: about 56 hectares a year in 2021–2025, against 56 hectares a year in 2016–2020. The worst year was 2023, when about 123 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 | 4 ha | 1 ha | 5 ha |
| 2004 | 2 ha | 3 ha | 4 ha |
| 2005 | 4 ha | under 1 ha | 4 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | 1 ha | under 1 ha | 2 ha |
| 2008 | 1 ha | under 1 ha | 1 ha |
| 2009 | 13 ha | 5 ha | 18 ha |
| 2010 | under 1 ha | 1 ha | 2 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | 7 ha | 7 ha | 14 ha |
| 2013 | 2 ha | under 1 ha | 2 ha |
| 2014 | 3 ha | 2 ha | 5 ha |
| 2015 | 5 ha | 38 ha | 44 ha |
| 2016 | 4 ha | 101 ha | 105 ha |
| 2017 | 15 ha | 45 ha | 60 ha |
| 2018 | 6 ha | 74 ha | 79 ha |
| 2019 | 5 ha | 8 ha | 13 ha |
| 2020 | 6 ha | 15 ha | 21 ha |
| 2021 | 12 ha | 29 ha | 41 ha |
| 2022 | 21 ha | 51 ha | 72 ha |
| 2023 | 28 ha | 95 ha | 123 ha |
| 2024 | 9 ha | 25 ha | 34 ha |
| 2025 | 6 ha | 3 ha | 9 ha |
What is causing deforestation around Catchiungo?
- Loggingcan grow back76% · 502 ha
- Farms, pasture and plantationscleared for good23% · 152 ha
Also: towns and roads, wildfires, 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
- 2,330 ha
- Forest in 2020
- 1,130 ha
- Overall change
- −1,200 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Catchiungo shrank from about 2,330 hectares to 1,130 hectares, a net loss of about 1,200 hectares (−52%). New forest grew on about 163 hectares, but 1,370 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 Catchiungo
What is the air quality (AQI) in Catchiungo right now?
The latest reading for Catchiungo shows an AQI of 36 (Good), observed Nov 10, 19:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Catchiungo today?
At AQI 36 (Good): a good day to be active outside. Windows: open them to air the house. Masks: not needed. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Catchiungo been like this week?
Over the last 7 days, the CAMS air-quality model put Catchiungo's daily AQI at 43 on average, from 25 on Nov 10 to an hourly peak of 66 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Catchiungo lost since 2001?
Since 2001, the area within 10 km of Catchiungo has lost about 658 hectares of forest (about 920 football pitches): 55% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 155 hectares (24%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss has stayed about the same: about 56 hectares a year in 2021–2025, against 56 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Catchiungo shrank from about 2,330 hectares to 1,130 hectares, a net loss of about 1,200 hectares (−52%). New forest grew on about 163 hectares, but 1,370 hectares were lost.
What is the tree count in Catchiungo?
Catchiungo has an estimated 31,416 trees across the 12.57 km² measured — 10.0% tree cover, 20 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Catchiungo need?
Catchiungo needs roughly 62,832 more trees to close a 20-point shortfall against its 30% tree-cover target — about 1,382 t of extra CO₂ absorbed per year once grown.
How are Catchiungo'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 Catchiungo; the tree count is an estimate derived from that cover.
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