City report · East Kalimantan, Indonesia
Bontang Air quality today
Air quality in Bontang currently reads AQI 52 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 52
Moderate
- PM2.5, fine particles (µg/m³)
- 10.3
- tree cover
- 27.5%
- trees in this area
- 85.7K
- more trees needed
- 7.8K
Measured across a 2 km radius around Bontang, Bontang City, East Kalimantan, Indonesia (12.57 km²), from a satellite image of Sep 23, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Bontang · AQI 52 (Moderate)
Bontang's tree count comes to 85,703 trees across 12.47 km² of land, 2 points below the 30% tree-cover level considered healthy for this area, so roughly 7,791 more trees would close the gap.
Air quality detail
Air quality in Bontang today: AQI 52, Moderate
Main pollutant: PM2.5 · Observed Nov 10, 21:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 105 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 105 km, e.g. Samarinda and Samarinda
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
10.3
PM10
9.2
NO₂
4.5
O₃
40.0
SO₂
1.9
CO
161.0
- 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 Bontang's daily AQI at 61 on average, from 34 on Nov 9 to an hourly peak of 126 on Nov 5.
This is the US EPA AQI. How it differs from Indonesia's ISPU
Where Bontang stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Bontang: Below target
27.5% tree cover against a 30% healthy-neighborhood target, across 12.47 km² of land.
Trees in this area
85,703
Target trees
93,494
More trees needed
7,791
CO₂ if planted / yr
171.4 t
Deforestation · 2001–2025
How much forest has Bontang lost?
Since 2001, the area within 10 km of Bontang has lost about 5,600 hectares of forest (about 7,800 football pitches): 46% of the forest it had in 2000. Most of it (97%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2018: satellite photo from September 2018 of a 5 × 5 km area about 7 km southwest of the city center.
- Forest lost since 2001
- 5,600 haabout 7,800 football pitches
- Share of its forest
- 46%of what there was in 2000
- Cleared for good
- 5,420 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 122 hectares a year in 2021–2025, down from 401 hectares a year in 2016–2020. The worst year was 2016, when about 1,390 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 | 63 ha | 7 ha | 70 ha |
| 2002 | 248 ha | 64 ha | 312 ha |
| 2003 | 80 ha | 4 ha | 84 ha |
| 2004 | 144 ha | 3 ha | 147 ha |
| 2005 | 147 ha | 5 ha | 152 ha |
| 2006 | 28 ha | under 1 ha | 28 ha |
| 2007 | 152 ha | under 1 ha | 152 ha |
| 2008 | 159 ha | under 1 ha | 159 ha |
| 2009 | 366 ha | 3 ha | 369 ha |
| 2010 | 93 ha | under 1 ha | 93 ha |
| 2011 | 30 ha | under 1 ha | 30 ha |
| 2012 | 334 ha | 1 ha | 335 ha |
| 2013 | 179 ha | 3 ha | 182 ha |
| 2014 | 266 ha | 4 ha | 270 ha |
| 2015 | 591 ha | 8 ha | 599 ha |
| 2016 | 1,380 ha | 11 ha | 1,390 ha |
| 2017 | 145 ha | 18 ha | 163 ha |
| 2018 | 118 ha | 5 ha | 123 ha |
| 2019 | 118 ha | 3 ha | 121 ha |
| 2020 | 199 ha | 7 ha | 206 ha |
| 2021 | 66 ha | 26 ha | 92 ha |
| 2022 | 81 ha | 3 ha | 84 ha |
| 2023 | 190 ha | 4 ha | 194 ha |
| 2024 | 165 ha | under 1 ha | 165 ha |
| 2025 | 74 ha | under 1 ha | 75 ha |
What is causing deforestation around Bontang?
- Farms, pasture and plantationscleared for good91% · 5,110 ha
- Towns and roadscleared for good5.5% · 309 ha
- Storms, floods and other natural causescan grow back2.9% · 160 ha
Also: 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
- 11,100 ha
- Forest in 2020
- 9,180 ha
- Overall change
- −1,880 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Bontang shrank from about 11,100 hectares to 9,180 hectares, a net loss of about 1,880 hectares (−17%). New forest grew on about 403 hectares, but 2,280 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 Bontang
Same 2 km radius, same index — so they compare directly.
- Samarinda79.0 km
Indonesia
- Tree cover
- 13%
- Air quality
- 58
- Loa Janan90.6 km
Indonesia
- Tree cover
- 39%
- Air quality
- 58
- Nusantara150.2 km
Indonesia
- Tree cover
- 48%
- Air quality
- 36
- Balikpapan171.9 km
Indonesia
- Tree cover
- 30%
- Air quality
- 54
- Palu289.4 km
Indonesia
- Tree cover
- 12%
- Air quality
- 49
- Tarakan353.9 km
Indonesia
- Tree cover
- 43%
- Air quality
- 12
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Frequently asked
Questions about Bontang
What is the air quality (AQI) in Bontang right now?
The latest reading for Bontang shows an AQI of 52 (Moderate), observed Nov 10, 21:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 105 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 Bontang today?
At AQI 52 (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 Bontang been like this week?
Over the last 7 days, the CAMS air-quality model put Bontang's daily AQI at 61 on average, from 34 on Nov 9 to an hourly peak of 126 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
Is Bontang'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 Bontang lost since 2001?
Since 2001, the area within 10 km of Bontang has lost about 5,600 hectares of forest (about 7,800 football pitches): 46% of the forest it had in 2000. Most of it (97%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Forest loss is slowing down: about 122 hectares a year in 2021–2025, down from 401 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Bontang shrank from about 11,100 hectares to 9,180 hectares, a net loss of about 1,880 hectares (−17%). New forest grew on about 403 hectares, but 2,280 hectares were lost.
What is the tree count in Bontang?
Bontang has an estimated 85,703 trees across the 12.47 km² of land measured — 27.5% tree cover, 2 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Bontang need?
Bontang needs roughly 7,791 more trees to close a 2-point shortfall against its 30% tree-cover target — about 171.4 t of extra CO₂ absorbed per year once grown.
How are Bontang'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 Bontang; the tree count is an estimate derived from that cover.
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