City report · Uganda
Njeru Air quality today
Air quality in Njeru currently reads AQI 100 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 100
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 38.6
- tree cover
- 35.2%
- trees in this area
- 100K
- more trees needed
- 0
Measured across a 2 km radius around Buikwe, Central, Uganda (12.57 km²), from a satellite image of Sep 7, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Njeru · AQI 100 (Moderate)
Njeru's tree count comes to 100,189 trees across 11.39 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Njeru today: AQI 100, Moderate
Main pollutant: PM2.5 · Observed Nov 10, 22:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 65 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 65 km, e.g. Mukono and Kampala
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
38.6
PM10
22.2
NO₂
5.8
O₃
65.0
SO₂
1.8
CO
960.0
- 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 Njeru's daily AQI at 73 on average, from 60 on Nov 4 to an hourly peak of 163 on Nov 10.
Where Njeru stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Njeru: Healthy tree cover
35.2% tree cover against a 30% healthy-neighborhood target, across 11.39 km² of land.
Trees in this area
100,189
Target trees
100,189
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Njeru lost?
Since 2001, the area within 10 km of Njeru has lost about 1,250 hectares of forest (about 1,800 football pitches): 9.6% of the forest it had in 2000. Most of it (86%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from August 2017 of a 5 × 5 km area about 7 km west of the city center.
- Forest lost since 2001
- 1,250 haabout 1,800 football pitches
- Share of its forest
- 9.6%of what there was in 2000
- Cleared for good
- 1,080 hadeforestation: turned into farms, mines or towns
Forest loss has stayed about the same: about 78 hectares a year in 2021–2025, against 102 hectares a year in 2016–2020. The worst year was 2020, when about 190 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 | 10 ha | 1 ha | 11 ha |
| 2002 | 2 ha | under 1 ha | 3 ha |
| 2003 | 8 ha | 2 ha | 10 ha |
| 2004 | 8 ha | under 1 ha | 9 ha |
| 2005 | 9 ha | under 1 ha | 9 ha |
| 2006 | 11 ha | under 1 ha | 12 ha |
| 2007 | 18 ha | 3 ha | 21 ha |
| 2008 | 10 ha | under 1 ha | 11 ha |
| 2009 | 5 ha | under 1 ha | 6 ha |
| 2010 | 14 ha | 2 ha | 16 ha |
| 2011 | 16 ha | 2 ha | 18 ha |
| 2012 | 14 ha | under 1 ha | 14 ha |
| 2013 | 39 ha | 4 ha | 42 ha |
| 2014 | 79 ha | 7 ha | 86 ha |
| 2015 | 74 ha | 12 ha | 86 ha |
| 2016 | 79 ha | 16 ha | 95 ha |
| 2017 | 67 ha | 13 ha | 80 ha |
| 2018 | 52 ha | 10 ha | 62 ha |
| 2019 | 63 ha | 21 ha | 84 ha |
| 2020 | 169 ha | 21 ha | 190 ha |
| 2021 | 57 ha | 16 ha | 74 ha |
| 2022 | 74 ha | 14 ha | 89 ha |
| 2023 | 51 ha | 8 ha | 59 ha |
| 2024 | 83 ha | 11 ha | 94 ha |
| 2025 | 65 ha | 11 ha | 76 ha |
What is causing deforestation around Njeru?
- Farms, pasture and plantationscleared for good75% · 945 ha
- Loggingcan grow back14% · 170 ha
- Towns and roadscleared for good11% · 132 ha
Also: shifting farming, storms, floods and other natural causes, 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
- 12,700 ha
- Forest in 2020
- 13,200 ha
- Overall change
- +420 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Njeru grew from about 12,700 hectares to 13,200 hectares, a net gain of about 420 hectares (+3.3%). New forest grew on about 834 hectares, while 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
In the same region
Measured cities near Njeru
Same 2 km radius, same index — so they compare directly.
- Mukono48.1 km
Uganda
- Tree cover
- 25%
- Air quality
- 88
- Kira60.9 km
Uganda
- Tree cover
- 21%
- Air quality
- 88
- Kajansi76.0 km
Uganda
- Tree cover
- 17%
- Air quality
- 88
- Kyengera77.1 km
Uganda
- Tree cover
- 40%
- Air quality
- 88
Also compared:Njeru vs MbararaNjeru vs GuluNjeru vs Mbale
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Frequently asked
Questions about Njeru
What is the air quality (AQI) in Njeru right now?
The latest reading for Njeru shows an AQI of 100 (Moderate), observed Nov 10, 22:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 65 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 Njeru today?
At AQI 100 (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 Njeru been like this week?
Over the last 7 days, the CAMS air-quality model put Njeru's daily AQI at 73 on average, from 60 on Nov 4 to an hourly peak of 163 on Nov 10. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Njeru lost since 2001?
Since 2001, the area within 10 km of Njeru has lost about 1,250 hectares of forest (about 1,800 football pitches): 9.6% of the forest it had in 2000. Most of it (86%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Forest loss has stayed about the same: about 78 hectares a year in 2021–2025, against 102 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Njeru grew from about 12,700 hectares to 13,200 hectares, a net gain of about 420 hectares (+3.3%). New forest grew on about 834 hectares, while 415 hectares were lost.
What is the tree count in Njeru?
Njeru has an estimated 100,189 trees across the 11.39 km² of land measured — 35.2% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Njeru need?
Njeru has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Njeru'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 Buikwe; the tree count is an estimate derived from that cover.
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