City report · West Java, Indonesia
Lembang Air quality today
Air quality in Lembang currently reads AQI 56 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 56
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 12.6
- tree cover
- 54.1%
- trees in this area
- 170K
- more trees needed
- 0
Measured across a 2 km radius around Lembang, West Bandung Regency, West Java, Indonesia (12.57 km²), from a satellite image of Sep 5, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Lembang · AQI 56 (Moderate)
Lembang's tree count comes to 169,960 trees across 12.57 km², already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Lembang today: AQI 56, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 14:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 125 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 125 km, e.g. Bekasi and South Jakarta
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
12.6
PM10
49.6
NO₂
9.9
O₃
215.0
SO₂
19.5
CO
528.0
- 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 Lembang's daily AQI at 161 on average, from 151 on Nov 5 to an hourly peak of 237 on Nov 7.
This is the US EPA AQI. How it differs from Indonesia's ISPU
Where Lembang stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Lembang: Healthy tree cover
54.1% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
169,960
Target trees
169,960
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Lembang lost?
Since 2001, the area within 10 km of Lembang has lost about 360 hectares of forest (about 500 football pitches): 2.1% of the forest it had in 2000. The biggest cause was farms, pasture and plantations (45%). About 169 hectares (47%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from September 2017 of a 5 × 5 km area about 7 km north of the city center.
- Forest lost since 2001
- 360 haabout 500 football pitches
- Share of its forest
- 2.1%of what there was in 2000
- Cleared for good
- 169 hadeforestation: turned into farms, mines or towns
The worst year was 2016, when about 53 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 | 26 ha | 32 ha |
| 2002 | 1 ha | 13 ha | 14 ha |
| 2003 | 3 ha | 4 ha | 7 ha |
| 2004 | 7 ha | 2 ha | 9 ha |
| 2005 | 2 ha | under 1 ha | 3 ha |
| 2006 | 3 ha | 2 ha | 5 ha |
| 2007 | 1 ha | 2 ha | 3 ha |
| 2008 | 5 ha | 7 ha | 12 ha |
| 2009 | 12 ha | 5 ha | 17 ha |
| 2010 | 12 ha | 13 ha | 25 ha |
| 2011 | 16 ha | 2 ha | 18 ha |
| 2012 | 4 ha | 4 ha | 8 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | 2 ha | 3 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | 9 ha | 44 ha | 53 ha |
| 2017 | 31 ha | 13 ha | 43 ha |
| 2018 | 2 ha | 3 ha | 5 ha |
| 2019 | under 1 ha | 5 ha | 5 ha |
| 2020 | 4 ha | 11 ha | 15 ha |
| 2021 | 4 ha | 13 ha | 17 ha |
| 2022 | 14 ha | 5 ha | 19 ha |
| 2023 | 10 ha | 6 ha | 16 ha |
| 2024 | 16 ha | 5 ha | 21 ha |
| 2025 | 4 ha | 3 ha | 7 ha |
What is causing deforestation around Lembang?
- Farms, pasture and plantationscleared for good45% · 161 ha
- Shifting farmingcan grow back21% · 74 ha
- Loggingcan grow back15% · 52 ha
Also: storms, floods and other natural causes, towns and roads, 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
- 24,700 ha
- Forest in 2020
- 24,800 ha
- Overall change
- +102 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Lembang stayed about the same size, at about 24,800 hectares: new forest grew on about 225 hectares, and about 122 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 Lembang
What is the air quality (AQI) in Lembang right now?
The latest reading for Lembang shows an AQI of 56 (Moderate), observed Nov 11, 14:00 local time via Open-Meteo / CAMS, corrected with 2 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 Lembang today?
At AQI 56 (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 Lembang been like this week?
Over the last 7 days, the CAMS air-quality model put Lembang's daily AQI at 161 on average, from 151 on Nov 5 to an hourly peak of 237 on Nov 7. On 7 of those days the average was above 100, unhealthy for sensitive groups.
Is Lembang's AQI the same as Indonesia's ISPU?
No. Airleaf shows the US EPA Air Quality Index (AQI), the scale used by IQAir and most air-quality apps. Indonesia's official index is the ISPU (Indeks Standar Pencemar Udara), published by the environment ministry from its own monitoring stations. Its bands are 0–50 Baik (good), 51–100 Sedang (moderate), 101–200 Tidak Sehat (unhealthy), 201–300 Sangat Tidak Sehat (very unhealthy) and over 300 Berbahaya (hazardous). The two indexes use different breakpoints and averaging times, so the same air can score differently on each.
How much forest has the area around Lembang lost since 2001?
Since 2001, the area within 10 km of Lembang has lost about 360 hectares of forest (about 500 football pitches): 2.1% of the forest it had in 2000. The biggest cause was farms, pasture and plantations (45%). About 169 hectares (47%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Lembang stayed about the same size, at about 24,800 hectares: new forest grew on about 225 hectares, and about 122 hectares were lost.
What is the tree count in Lembang?
Lembang has an estimated 169,960 trees across the 12.57 km² measured — 54.1% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Lembang need?
Lembang has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Lembang'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 Lembang; the tree count is an estimate derived from that cover.
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