City report · East Java, Indonesia
Lumajang Air quality today
Air quality in Lumajang currently reads AQI 289 (Very unhealthy): Health alert — everyone should avoid long outdoor exertion.
AQI 289
Air quality right now
Very unhealthy
- PM2.5, fine particles (µg/m³)
- 223.7
- tree cover
- 15.0%
- trees in this area
- 47.1K
- more trees needed
- 94.2K
Measured across a 2 km radius around Lumajang, Lumajang Regency, East Java, Indonesia (12.57 km²), from a satellite image of Sep 26, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Lumajang · AQI 289 (Very unhealthy)
Lumajang's tree count comes to 47,124 trees across 12.57 km², 30 points below the 45% tree-cover level considered healthy for this area, so roughly 94,248 more trees would close the gap.
Air quality detail
Air quality in Lumajang today: AQI 289, Very unhealthy
Main pollutant: PM2.5 · Observed Nov 11, 01:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 245 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 245 km, e.g. Sukawati and Semarapura
Health signal
Health alert — everyone should avoid long outdoor exertion.
PM2.5
223.7
PM10
119.7
NO₂
36.0
O₃
1.0
SO₂
5.4
CO
875.0
- Outdoor exercise
- Everyone should avoid long or hard exercise outdoors; sensitive groups, all outdoor exertion
- Windows
- Keep them closed
- Mask
- Wear an N95 if you go out
- Air purifier
- Run one on high
Over the last 7 days, the CAMS air-quality model put Lumajang's daily AQI at 134 on average, from 103 on Nov 5 to an hourly peak of 221 on Nov 7.
This is the US EPA AQI. How it differs from Indonesia's ISPU
Where Lumajang stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Lumajang: Critically low
15.0% tree cover against a 45% healthy-neighborhood target, across 12.57 km².
Trees in this area
47,124
Target trees
141,372
More trees needed
94,248
CO₂ if planted / yr
2,073 t
Deforestation · 2001–2025
How much forest has Lumajang lost?
Since 2001, the area within 10 km of Lumajang has lost about 341 hectares of forest (about 480 football pitches): 2.8% of the forest it had in 2000. Most of it (98%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from June 2017 of a 5 × 5 km area about 7 km north of the city center.
- Forest lost since 2001
- 341 haabout 480 football pitches
- Share of its forest
- 2.8%of what there was in 2000
- Cleared for good
- 333 hadeforestation: turned into farms, mines or towns
The worst year was 2019, when about 64 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 | 12 ha | under 1 ha | 12 ha |
| 2002 | 3 ha | under 1 ha | 4 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | 6 ha | under 1 ha | 6 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | 8 ha | under 1 ha | 8 ha |
| 2007 | 1 ha | under 1 ha | 1 ha |
| 2008 | 8 ha | under 1 ha | 9 ha |
| 2009 | 14 ha | 1 ha | 15 ha |
| 2010 | 8 ha | under 1 ha | 8 ha |
| 2011 | 7 ha | under 1 ha | 7 ha |
| 2012 | 10 ha | under 1 ha | 11 ha |
| 2013 | 8 ha | under 1 ha | 9 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | 1 ha | under 1 ha | 1 ha |
| 2017 | 20 ha | under 1 ha | 21 ha |
| 2018 | 30 ha | under 1 ha | 31 ha |
| 2019 | 64 ha | under 1 ha | 64 ha |
| 2020 | 17 ha | under 1 ha | 17 ha |
| 2021 | 25 ha | under 1 ha | 25 ha |
| 2022 | 13 ha | under 1 ha | 13 ha |
| 2023 | 36 ha | under 1 ha | 36 ha |
| 2024 | 26 ha | under 1 ha | 27 ha |
| 2025 | 15 ha | under 1 ha | 16 ha |
What is causing deforestation around Lumajang?
- Farms, pasture and plantationscleared for good95% · 323 ha
- Towns and roadscleared for good2.9% · 10 ha
- Unknown causescause unknown2.3% · 8 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
- 15,500 ha
- Forest in 2020
- 15,200 ha
- Overall change
- −268 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Lumajang stayed about the same size, at about 15,200 hectares: new forest grew on about 330 hectares, and about 598 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 Lumajang
What is the air quality (AQI) in Lumajang right now?
The latest reading for Lumajang shows an AQI of 289 (Very unhealthy), observed Nov 11, 01:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 245 km, US EPA index. The main pollutant is PM2.5. Health alert — everyone should avoid long outdoor exertion.
Is it safe to exercise outside in Lumajang today?
At AQI 289 (Very unhealthy): everyone should avoid long or hard exercise outdoors; sensitive groups, all outdoor exertion. Windows: keep them closed. Masks: wear an N95 if you go out. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Lumajang been like this week?
Over the last 7 days, the CAMS air-quality model put Lumajang's daily AQI at 134 on average, from 103 on Nov 5 to an hourly peak of 221 on Nov 7. On 7 of those days the average was above 100, unhealthy for sensitive groups.
Is Lumajang'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 Lumajang lost since 2001?
Since 2001, the area within 10 km of Lumajang has lost about 341 hectares of forest (about 480 football pitches): 2.8% of the forest it had in 2000. Most of it (98%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Comparing satellite maps from 2000 and 2020, the forest around Lumajang stayed about the same size, at about 15,200 hectares: new forest grew on about 330 hectares, and about 598 hectares were lost.
What is the tree count in Lumajang?
Lumajang has an estimated 47,124 trees across the 12.57 km² measured — 15.0% tree cover, 30 percentage points short of the 45% tree-cover target set for this area.
How many more trees does Lumajang need?
Lumajang needs roughly 94,248 more trees to close a 30-point shortfall against its 45% tree-cover target — about 2,073 t of extra CO₂ absorbed per year once grown.
How are Lumajang'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 Lumajang; the tree count is an estimate derived from that cover.
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