City report · Bangladesh
Sylhet Air quality today
Air quality in Sylhet currently reads AQI 84 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 84
Moderate
- PM2.5, fine particles (µg/m³)
- 31.1
- tree cover
- 44.2%
- trees in this area
- 136K
- more trees needed
- 0
Measured across a 2 km radius around Mirboxtula, Sylhet, Bangladesh (12.57 km²), from a satellite image of Oct 27, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Sylhet · AQI 84 (Moderate)
Sylhet's tree count comes to 136,359 trees across 12.34 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Sylhet today: AQI 84, Moderate
Main pollutant: PM2.5 · Observed Nov 10, 21:00 local time via Open-Meteo / CAMS, corrected with 11 ground-station cities within 205 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 11 station cities within 205 km, e.g. Silchar and Guwahati
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
31.1
PM10
36.3
NO₂
17.7
O₃
49.0
SO₂
5.3
CO
1304.0
- 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 Sylhet's daily AQI at 134 on average, from 89 on Nov 10 to an hourly peak of 189 on Nov 4.
Where Sylhet stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Sylhet: Healthy tree cover
44.2% tree cover against a 30% healthy-neighborhood target, across 12.34 km² of land.
Trees in this area
136,359
Target trees
136,359
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Sylhet lost?
Since 2001, the area within 10 km of Sylhet has lost about 102 hectares of forest (about 140 football pitches): 2.5% of the forest it had in 2000. Most of it (91%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from February 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 102 haabout 140 football pitches
- Share of its forest
- 2.5%of what there was in 2000
- Cleared for good
- 92 hadeforestation: turned into farms, mines or towns
The worst year was 2004, when about 12 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 | 5 ha | under 1 ha | 6 ha |
| 2002 | 4 ha | under 1 ha | 4 ha |
| 2003 | 1 ha | under 1 ha | 2 ha |
| 2004 | 11 ha | under 1 ha | 12 ha |
| 2005 | 1 ha | under 1 ha | 2 ha |
| 2006 | 4 ha | 1 ha | 5 ha |
| 2007 | 8 ha | under 1 ha | 8 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | 8 ha | under 1 ha | 9 ha |
| 2010 | 4 ha | 1 ha | 6 ha |
| 2011 | 5 ha | under 1 ha | 5 ha |
| 2012 | 6 ha | under 1 ha | 7 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | 2 ha | under 1 ha | 2 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | 2 ha | under 1 ha | 2 ha |
| 2018 | 2 ha | under 1 ha | 2 ha |
| 2019 | 3 ha | under 1 ha | 3 ha |
| 2020 | 9 ha | under 1 ha | 9 ha |
| 2021 | 7 ha | under 1 ha | 7 ha |
| 2022 | 3 ha | under 1 ha | 4 ha |
| 2023 | 3 ha | under 1 ha | 3 ha |
| 2024 | 1 ha | under 1 ha | 1 ha |
| 2025 | 1 ha | under 1 ha | 2 ha |
What is causing deforestation around Sylhet?
- Farms, pasture and plantationscleared for good83% · 84 ha
- Towns and roadscleared for good7.8% · 8 ha
- Loggingcan grow back1.2% · 1 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
- 11,600 ha
- Forest in 2020
- 12,600 ha
- Overall change
- +977 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Sylhet grew from about 11,600 hectares to 12,600 hectares, a net gain of about 977 hectares (+8.4%). New forest grew on about 1,100 hectares, while 120 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 Sylhet
Same 2 km radius, same index — so they compare directly.
- Shillong74.5 km
India
- Tree cover
- 45%
- Air quality
- 36
- Silchar93.8 km
India
- Tree cover
- 42%
- Air quality
- 95
- Brāhmanbāria128.4 km
Bangladesh
- Tree cover
- 46%
- Air quality
- 64
- Ashuganj City129.2 km
Bangladesh
- Tree cover
- 53%
- Air quality
- 123
- Agartala132.6 km
India
- Tree cover
- 28%
- Air quality
- 29
- Nagar Naluākot138.5 km
Bangladesh
- Tree cover
- 90%
- Air quality
- 54
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Frequently asked
Questions about Sylhet
What is the air quality (AQI) in Sylhet right now?
The latest reading for Sylhet shows an AQI of 84 (Moderate), observed Nov 10, 21:00 local time via Open-Meteo / CAMS, corrected with 11 ground-station cities within 205 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 Sylhet today?
At AQI 84 (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 Sylhet been like this week?
Over the last 7 days, the CAMS air-quality model put Sylhet's daily AQI at 134 on average, from 89 on Nov 10 to an hourly peak of 189 on Nov 4. On 6 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Sylhet lost since 2001?
Since 2001, the area within 10 km of Sylhet has lost about 102 hectares of forest (about 140 football pitches): 2.5% of the forest it had in 2000. Most of it (91%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Comparing satellite maps from 2000 and 2020, the forest around Sylhet grew from about 11,600 hectares to 12,600 hectares, a net gain of about 977 hectares (+8.4%). New forest grew on about 1,100 hectares, while 120 hectares were lost.
What is the tree count in Sylhet?
Sylhet has an estimated 136,359 trees across the 12.34 km² of land measured — 44.2% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Sylhet need?
Sylhet has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Sylhet'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 Mirboxtula; the tree count is an estimate derived from that cover.
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