City report · West Java, Indonesia
Cimahi Air quality today
Air quality in Cimahi currently reads AQI 90 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 90
Moderate
- PM2.5, fine particles (µg/m³)
- 30.8
- tree cover
- 10.9%
- trees in this area
- 34.2K
- more trees needed
- 60.0K
Measured across a 2 km radius around Cimahi, Cimahi Tengah, Cimahi City, West Java, Indonesia (12.57 km²), from a satellite image of Sep 17, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Cimahi · AQI 90 (Moderate)
Cimahi's tree count comes to 34,243 trees across 12.57 km², 19 points below the 30% tree-cover level considered healthy for this area, so roughly 60,004 more trees would close the gap.
Air quality detail
Air quality in Cimahi today: AQI 90, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 13:00 local time via Open-Meteo / CAMS, corrected with 6 ground-station cities within 105 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 6 station cities within 105 km, e.g. Cileungsi and Cibinong
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
30.8
PM10
45.4
NO₂
9.4
O₃
207.0
SO₂
18.8
CO
639.0
- 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 Cimahi's daily AQI at 162 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 Cimahi stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Cimahi: Critically low
10.9% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
34,243
Target trees
94,247
More trees needed
60,004
CO₂ if planted / yr
1,320 t
Deforestation · 2001–2025
How much forest has Cimahi lost?
Since 2001, the area within 10 km of Cimahi has lost about 56 hectares of forest (about 79 football pitches): under 1% of the forest it had in 2000. Most of it (80%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 56 haabout 79 football pitches
- Share of its forest
- under 1%of what there was in 2000
- Cleared for good
- 45 hadeforestation: turned into farms, mines or towns
The worst year was 2006, when about 7 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 | 3 ha | under 1 ha | 3 ha |
| 2002 | under 1 ha | under 1 ha | 1 ha |
| 2003 | 3 ha | under 1 ha | 4 ha |
| 2004 | 3 ha | under 1 ha | 4 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | 6 ha | 1 ha | 7 ha |
| 2007 | 3 ha | under 1 ha | 3 ha |
| 2008 | 1 ha | under 1 ha | 2 ha |
| 2009 | under 1 ha | under 1 ha | 2 ha |
| 2010 | 2 ha | under 1 ha | 2 ha |
| 2011 | 4 ha | 1 ha | 5 ha |
| 2012 | 1 ha | under 1 ha | 2 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | 1 ha |
| 2015 | 3 ha | under 1 ha | 4 ha |
| 2016 | 1 ha | under 1 ha | 1 ha |
| 2017 | 3 ha | under 1 ha | 4 ha |
| 2018 | 2 ha | under 1 ha | 2 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | 1 ha | under 1 ha | 2 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | 3 ha | under 1 ha | 3 ha |
| 2024 | 2 ha | under 1 ha | 2 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Cimahi?
- Towns and roadscleared for good76% · 43 ha
- Farms, pasture and plantationscleared for good3.5% · 2 ha
- Unknown causescause unknown21% · 12 ha
Also: mining and energy.
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
- 13,100 ha
- Forest in 2020
- 13,100 ha
- Overall change
- −16 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Cimahi stayed about the same size, at about 13,100 hectares: new forest grew on about 233 hectares, and about 248 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 Cimahi
What is the air quality (AQI) in Cimahi right now?
The latest reading for Cimahi shows an AQI of 90 (Moderate), observed Nov 11, 13:00 local time via Open-Meteo / CAMS, corrected with 6 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 Cimahi today?
At AQI 90 (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 Cimahi been like this week?
Over the last 7 days, the CAMS air-quality model put Cimahi's daily AQI at 162 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 Cimahi'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 Cimahi lost since 2001?
Since 2001, the area within 10 km of Cimahi has lost about 56 hectares of forest (about 79 football pitches): under 1% of the forest it had in 2000. Most of it (80%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Cimahi stayed about the same size, at about 13,100 hectares: new forest grew on about 233 hectares, and about 248 hectares were lost.
What is the tree count in Cimahi?
Cimahi has an estimated 34,243 trees across the 12.57 km² measured — 10.9% tree cover, 19 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Cimahi need?
Cimahi needs roughly 60,004 more trees to close a 19-point shortfall against its 30% tree-cover target — about 1,320 t of extra CO₂ absorbed per year once grown.
How are Cimahi'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 Cimahi; the tree count is an estimate derived from that cover.
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