City report · North Sumatra, Indonesia
Gunungsitoli Air quality today
Air quality in Gunungsitoli currently reads AQI 16 (Good): Air quality is satisfactory for everyone.
AQI 16
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 2.7
- tree cover
- 64.3%
- trees in this area
- 128K
- more trees needed
- 0
Measured across a 2 km radius around Gunungsitoli, Gunungsitoli City, North Sumatra, Indonesia (12.57 km²), from a satellite image of Aug 28, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Gunungsitoli · AQI 16 (Good)
Gunungsitoli's tree count comes to 127,667 trees across 7.94 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Gunungsitoli today: AQI 16, Good
Main pollutant: PM2.5 · Observed Nov 11, 14:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Air quality is satisfactory for everyone.
PM2.5
2.7
PM10
3.3
NO₂
0.3
O₃
65.0
SO₂
0.3
CO
211.0
- 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 Gunungsitoli's daily AQI at 35 on average, from 28 on Nov 10 to an hourly peak of 68 on Nov 11.
This is the US EPA AQI. How it differs from Indonesia's ISPU
Where Gunungsitoli stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Gunungsitoli: Healthy tree cover
64.3% tree cover against a 30% healthy-neighborhood target, across 7.94 km² of land.
Trees in this area
127,667
Target trees
127,667
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Gunungsitoli lost?
Since 2001, the area within 10 km of Gunungsitoli has lost about 710 hectares of forest (about 990 football pitches): 4.5% of the forest it had in 2000. Most of it (98%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2018: satellite photo from December 2017 of a 5 × 5 km area about 1 km south of the city center.
- Forest lost since 2001
- 710 haabout 990 football pitches
- Share of its forest
- 4.5%of what there was in 2000
- Cleared for good
- 693 hadeforestation: turned into farms, mines or towns
The worst year was 2009, when about 68 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 | 46 ha | under 1 ha | 47 ha |
| 2002 | 28 ha | 1 ha | 30 ha |
| 2003 | 11 ha | under 1 ha | 12 ha |
| 2004 | 2 ha | under 1 ha | 2 ha |
| 2005 | 28 ha | 2 ha | 30 ha |
| 2006 | 33 ha | 2 ha | 36 ha |
| 2007 | 40 ha | under 1 ha | 40 ha |
| 2008 | 8 ha | under 1 ha | 8 ha |
| 2009 | 67 ha | under 1 ha | 68 ha |
| 2010 | 51 ha | 4 ha | 55 ha |
| 2011 | 18 ha | under 1 ha | 18 ha |
| 2012 | 64 ha | 2 ha | 66 ha |
| 2013 | 6 ha | under 1 ha | 6 ha |
| 2014 | 32 ha | 2 ha | 34 ha |
| 2015 | 12 ha | under 1 ha | 12 ha |
| 2016 | 19 ha | under 1 ha | 19 ha |
| 2017 | 29 ha | under 1 ha | 29 ha |
| 2018 | 17 ha | under 1 ha | 18 ha |
| 2019 | 24 ha | under 1 ha | 24 ha |
| 2020 | 26 ha | under 1 ha | 27 ha |
| 2021 | 42 ha | under 1 ha | 42 ha |
| 2022 | 41 ha | under 1 ha | 42 ha |
| 2023 | 20 ha | under 1 ha | 20 ha |
| 2024 | 7 ha | under 1 ha | 8 ha |
| 2025 | 21 ha | under 1 ha | 21 ha |
What is causing deforestation around Gunungsitoli?
- Farms, pasture and plantationscleared for good71% · 503 ha
- Towns and roadscleared for good27% · 189 ha
- Shifting farmingcan grow back2% · 14 ha
Also: 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
- 16,100 ha
- Forest in 2020
- 16,100 ha
- Overall change
- −41 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Gunungsitoli stayed about the same size, at about 16,100 hectares: new forest grew on about 100 hectares, and about 141 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 Gunungsitoli
Same 2 km radius, same index — so they compare directly.
- Subulussalam156.6 km
Indonesia
- Tree cover
- 76%
- Air quality
- 57
- Padangsidempuan184.5 km
Indonesia
- Tree cover
- 53%
- Air quality
- 23
- Pematangsiantar246.2 km
Indonesia
- Tree cover
- 24%
- Air quality
- 53
- Rantauprapat262.6 km
Indonesia
- Tree cover
- 47%
- Air quality
- 29
- Binjai274.6 km
Indonesia
- Tree cover
- 50%
- Air quality
- 66
- Medan280.6 km
Indonesia
- Tree cover
- 16%
- Air quality
- 154
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Frequently asked
Questions about Gunungsitoli
What is the air quality (AQI) in Gunungsitoli right now?
The latest reading for Gunungsitoli shows an AQI of 16 (Good), observed Nov 11, 14:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Gunungsitoli today?
At AQI 16 (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 Gunungsitoli been like this week?
Over the last 7 days, the CAMS air-quality model put Gunungsitoli's daily AQI at 35 on average, from 28 on Nov 10 to an hourly peak of 68 on Nov 11. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
Is Gunungsitoli'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 Gunungsitoli lost since 2001?
Since 2001, the area within 10 km of Gunungsitoli has lost about 710 hectares of forest (about 990 football pitches): 4.5% 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 Gunungsitoli stayed about the same size, at about 16,100 hectares: new forest grew on about 100 hectares, and about 141 hectares were lost.
What is the tree count in Gunungsitoli?
Gunungsitoli has an estimated 127,667 trees across the 7.94 km² of land measured — 64.3% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Gunungsitoli need?
Gunungsitoli has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Gunungsitoli'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 Gunungsitoli; the tree count is an estimate derived from that cover.
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