City report · Aceh, Indonesia
Subulussalam Air quality today
Air quality in Subulussalam currently reads AQI 37 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 37
Good
- PM2.5, fine particles (µg/m³)
- 6.6
- tree cover
- 75.8%
- trees in this area
- 238K
- more trees needed
- 0
Measured across a 2 km radius around Kecamatan Simpang Kiri, Aceh, Indonesia (12.57 km²), from a satellite image of Oct 19, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Subulussalam · AQI 37 (Good)
Subulussalam's tree count comes to 238,133 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 Subulussalam today: AQI 37, Good
Main pollutant: PM2.5 · Observed Nov 11, 00:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 165 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 4 station cities within 165 km, e.g. Binjai and Medan
Health signal
Air quality is satisfactory for everyone.
PM2.5
6.6
PM10
12.2
NO₂
6.7
O₃
21.0
SO₂
0.7
CO
417.0
- Outdoor exercise
- A good day to be active outside
- Windows
- Open them to air the house
- Mask
- Not needed
- Air purifier
- Not needed
Over the last 7 days, the CAMS air-quality model put Subulussalam's daily AQI at 65 on average, from 49 on Nov 10 to an hourly peak of 147 on Nov 9.
This is the US EPA AQI. How it differs from Indonesia's ISPU
Where Subulussalam stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Subulussalam: Healthy tree cover
75.8% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
238,133
Target trees
238,133
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Subulussalam lost?
Since 2001, the area within 10 km of Subulussalam has lost about 18,000 hectares of forest (about 25,000 football pitches): 64% of the forest it had in 2000. Most of it (93%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2020: satellite photo from February 2020 of a 5 × 5 km area about 7 km northeast of the city center.
- Forest lost since 2001
- 18,000 haabout 25,000 football pitches
- Share of its forest
- 64%of what there was in 2000
- Cleared for good
- 16,800 hadeforestation: turned into farms, mines or towns
Forest loss has stayed about the same: about 427 hectares a year in 2021–2025, against 458 hectares a year in 2016–2020. The worst year was 2006, when about 1,960 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 | 277 ha | 18 ha | 295 ha |
| 2002 | 180 ha | 6 ha | 186 ha |
| 2003 | 140 ha | 3 ha | 143 ha |
| 2004 | 772 ha | 4 ha | 776 ha |
| 2005 | 703 ha | 4 ha | 707 ha |
| 2006 | 1,960 ha | 5 ha | 1,960 ha |
| 2007 | 749 ha | 24 ha | 773 ha |
| 2008 | 1,840 ha | 98 ha | 1,940 ha |
| 2009 | 1,770 ha | 134 ha | 1,910 ha |
| 2010 | 1,260 ha | 23 ha | 1,280 ha |
| 2011 | 943 ha | 10 ha | 953 ha |
| 2012 | 1,290 ha | 12 ha | 1,300 ha |
| 2013 | 378 ha | 63 ha | 441 ha |
| 2014 | 461 ha | 50 ha | 511 ha |
| 2015 | 340 ha | 42 ha | 382 ha |
| 2016 | 379 ha | 63 ha | 442 ha |
| 2017 | 374 ha | 110 ha | 484 ha |
| 2018 | 586 ha | 57 ha | 643 ha |
| 2019 | 254 ha | 61 ha | 315 ha |
| 2020 | 330 ha | 74 ha | 404 ha |
| 2021 | 403 ha | 24 ha | 427 ha |
| 2022 | 445 ha | 26 ha | 471 ha |
| 2023 | 262 ha | 47 ha | 309 ha |
| 2024 | 287 ha | 82 ha | 369 ha |
| 2025 | 378 ha | 183 ha | 561 ha |
What is causing deforestation around Subulussalam?
- Farms, pasture and plantationscleared for good93% · 16,700 ha
- Loggingcan grow back5.5% · 988 ha
- Shifting farmingcan grow back1.3% · 237 ha
Also: towns and roads.
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
- 28,300 ha
- Forest in 2020
- 26,600 ha
- Overall change
- −1,640 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Subulussalam shrank from about 28,300 hectares to 26,600 hectares, a net loss of about 1,640 hectares (−5.8%). New forest grew on about 1,730 hectares, but 3,370 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 Subulussalam
Same 2 km radius, same index — so they compare directly.
- Binjai119.2 km
Indonesia
- Tree cover
- 50%
- Air quality
- 104
- Pematangsiantar123.4 km
Indonesia
- Tree cover
- 24%
- Air quality
- 27
- Medan127.9 km
Indonesia
- Tree cover
- 16%
- Air quality
- 104
- Percut145.1 km
Indonesia
- Tree cover
- 30%
- Air quality
- 87
- Belawan146.8 km
Indonesia
- Tree cover
- 38%
- Air quality
- 139
- Perbaungan147.5 km
Indonesia
- Tree cover
- 54%
- Air quality
- 87
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Frequently asked
Questions about Subulussalam
What is the air quality (AQI) in Subulussalam right now?
The latest reading for Subulussalam shows an AQI of 37 (Good), observed Nov 11, 00:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 165 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Subulussalam today?
At AQI 37 (Good): a good day to be active outside. Windows: open them to air the house. Masks: not needed. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Subulussalam been like this week?
Over the last 7 days, the CAMS air-quality model put Subulussalam's daily AQI at 65 on average, from 49 on Nov 10 to an hourly peak of 147 on Nov 9. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
Is Subulussalam'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 Subulussalam lost since 2001?
Since 2001, the area within 10 km of Subulussalam has lost about 18,000 hectares of forest (about 25,000 football pitches): 64% of the forest it had in 2000. Most of it (93%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Forest loss has stayed about the same: about 427 hectares a year in 2021–2025, against 458 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Subulussalam shrank from about 28,300 hectares to 26,600 hectares, a net loss of about 1,640 hectares (−5.8%). New forest grew on about 1,730 hectares, but 3,370 hectares were lost.
What is the tree count in Subulussalam?
Subulussalam has an estimated 238,133 trees across the 12.57 km² measured — 75.8% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Subulussalam need?
Subulussalam has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Subulussalam'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 Kecamatan Simpang Kiri; the tree count is an estimate derived from that cover.
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