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Air quality now: AQI32Good, Langsa

City report · Aceh, Indonesia

Langsa Air quality today

Air quality in Langsa currently reads AQI 32 (Good): Air quality is satisfactory for everyone.

AQI 32

Air quality right now

Good

Main pollutant: PM2.5
PM2.5, fine particles (µg/m³)
6.7
tree cover
38.8%
trees in this area
122K
more trees needed
0

Measured across a 2 km radius around Langsa, Langsa Kota, Langsa City, Aceh, Indonesia (12.57 km²), from a satellite image of Aug 28, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.

Langsa · AQI 32 (Good)

Dark green marks tree cover detected inside the study radius.Sentinel-2 L2A (ESA Copernicus) via Earth Search, captured Aug 28, 2026

Langsa's tree count comes to 121,894 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 Langsa today: AQI 32, Good

Main pollutant: PM2.5 · Observed Nov 11, 06:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 145 km, US EPA index. Values in µg/m³.

Estimate · model corrected with 2 station cities within 145 km, e.g. Medan and Kecamatan Beringin

Health signal

Air quality is satisfactory for everyone.

PM2.5

6.7

PM10

7.3

NO₂

5.2

O₃

24.0

SO₂

1.2

CO

297.0

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 Langsa's daily AQI at 56 on average, from 38 on Nov 11 to an hourly peak of 140 on Nov 6.

Last 7 daysavg 56 · peak 140
Nov 5: AQI 55 (peak 115)Nov 6: AQI 78 (peak 140)Nov 7: AQI 69 (peak 123)Nov 8: AQI 49 (peak 71)Nov 9: AQI 45 (peak 61)Nov 10: AQI 57 (peak 88)Nov 11: AQI 38 (peak 49)
Nov 5Nov 11

This is the US EPA AQI. How it differs from Indonesia's ISPU

Where Langsa stands: the most polluted cities in the world right now · the cleanest

Tree cover detail

Tree cover in Langsa: Healthy tree cover

38.8% tree cover against a 30% healthy-neighborhood target, across 12.57 km².

Target reached

Trees in this area

121,894

Target trees

121,894

More trees needed

0

CO₂ if planted / yr

0 kg

Deforestation · 2001–2025

How much forest has Langsa lost?

Since 2001, the area within 10 km of Langsa has lost about 8,520 hectares of forest (about 12,000 football pitches): 46% of the forest it had in 2000. Most of it (over 99%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.

Satellite image of the area around Langsa, April 2018

2018: satellite photo from April 2018 of a 5 × 5 km area about 4 km southwest of the city center.

Forest lost since 2001
8,520 haabout 12,000 football pitches
Share of its forest
46%of what there was in 2000
Cleared for good
8,500 hadeforestation: turned into farms, mines or towns

Forest loss is slowing down: about 322 hectares a year in 2021–2025, down from 489 hectares a year in 2016–2020. The worst year was 2016, when about 863 hectares of forest were lost.

Forest lost each year around Langsa, 2001–2025

Hectares of forest lost each year

Forest lost each year around Langsa, 2001–2025. Use the left and right arrow keys to read each year.863

Show the figures as a table
Forest lost each year around Langsa, 2001–2025
YearCleared for goodCan grow backTotal
200183 haunder 1 ha83 ha
2002166 haunder 1 ha166 ha
200357 haunder 1 ha57 ha
2004162 haunder 1 ha162 ha
200580 haunder 1 ha80 ha
2006113 haunder 1 ha113 ha
2007101 haunder 1 ha101 ha
2008294 haunder 1 ha294 ha
2009470 haunder 1 ha470 ha
2010653 ha1 ha654 ha
2011625 haunder 1 ha625 ha
2012690 ha1 ha691 ha
2013232 haunder 1 ha232 ha
2014354 haunder 1 ha354 ha
2015385 ha2 ha387 ha
2016861 ha2 ha863 ha
2017754 ha2 ha756 ha
2018543 ha4 ha547 ha
2019169 ha4 ha173 ha
2020106 haunder 1 ha106 ha
2021192 ha1 ha193 ha
2022115 ha3 ha118 ha
2023731 ha1 ha732 ha
2024311 ha2 ha313 ha
2025253 haunder 1 ha253 ha

What is causing deforestation around Langsa?

  • Farms, pasture and plantationscleared for good98% · 8,340 ha
  • Towns and roadscleared for good1.9% · 163 ha

Also: storms, floods and other natural causes, shifting farming, 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
17,900 ha
Forest in 2020
16,200 ha
Overall change
−1,780 haless forest than in 2000

Comparing satellite maps from 2000 and 2020, the forest around Langsa shrank from about 17,900 hectares to 16,200 hectares, a net loss of about 1,780 hectares (−9.9%). New forest grew on about 780 hectares, but 2,560 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 Langsa

Same 2 km radius, same index — so they compare directly.

  • Belawan

    Indonesia

    110.5 km
    Tree cover
    38%
    Air quality
    155
  • Binjai

    Indonesia

    112.3 km
    Tree cover
    50%
    Air quality
    63
  • Lhokseumawe

    Indonesia

    120.3 km
    Tree cover
    15%
    Air quality
    23
  • Medan

    Indonesia

    125.2 km
    Tree cover
    16%
    Air quality
    166
  • Percut

    Indonesia

    136.6 km
    Tree cover
    30%
    Air quality
    166
  • Perbaungan

    Indonesia

    148.4 km
    Tree cover
    54%
    Air quality
    166

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Langsa air quality (AQI) and tree cover — measured by Airleaf
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Frequently asked

Questions about Langsa

What is the air quality (AQI) in Langsa right now?

The latest reading for Langsa shows an AQI of 32 (Good), observed Nov 11, 06:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 145 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.

Is it safe to exercise outside in Langsa today?

At AQI 32 (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 Langsa been like this week?

Over the last 7 days, the CAMS air-quality model put Langsa's daily AQI at 56 on average, from 38 on Nov 11 to an hourly peak of 140 on Nov 6. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.

Is Langsa'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 Langsa lost since 2001?

Since 2001, the area within 10 km of Langsa has lost about 8,520 hectares of forest (about 12,000 football pitches): 46% of the forest it had in 2000. Most of it (over 99%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Forest loss is slowing down: about 322 hectares a year in 2021–2025, down from 489 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Langsa shrank from about 17,900 hectares to 16,200 hectares, a net loss of about 1,780 hectares (−9.9%). New forest grew on about 780 hectares, but 2,560 hectares were lost.

What is the tree count in Langsa?

Langsa has an estimated 121,894 trees across the 12.57 km² measured — 38.8% tree cover, already past the 30% tree-cover target set for this area.

How many more trees does Langsa need?

Langsa has already reached its tree-cover target, so no additional trees are needed to close the gap.

How are Langsa'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 Langsa; the tree count is an estimate derived from that cover.

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