City report · Thailand
Khon Kaen Air quality today
Air quality in Khon Kaen currently reads AQI 64 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 64
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 16.3
- tree cover
- 30.5%
- trees in this area
- 94.4K
- more trees needed
- 0
Measured across a 2 km radius around Nai Mueang, Mueang Khon Kaen District, Khon Kaen 40000, Thailand (12.57 km²), from a satellite image of Jun 26, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Khon Kaen · AQI 64 (Moderate)
Khon Kaen's tree count comes to 94,381 trees across 12.38 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Khon Kaen today: AQI 64, Moderate
Main pollutant: PM2.5 · Observed Nov 12, 00:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Hydrogeological Group Water Resources Regional Office4 khonkaen, 300 m away
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
16.3
PM10
—
NO₂
—
O₃
—
SO₂
—
CO
—
Data: OpenAQ · Air4Thai, Pollution Control Department, Thailand · Air4Thai
- 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 Khon Kaen's daily AQI at 36 on average, from 21 on Nov 10 to an hourly peak of 62 on Nov 6.
Where Khon Kaen stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Khon Kaen: Healthy tree cover
30.5% tree cover against a 30% healthy-neighborhood target, across 12.38 km² of land.
Trees in this area
94,381
Target trees
94,381
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Khon Kaen lost?
Since 2001, the area within 10 km of Khon Kaen has lost about 26 hectares of forest (about 36 football pitches): 14% of the forest it had in 2000. Most of it (91%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from March 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 26 haabout 36 football pitches
- Share of its forest
- 14%of what there was in 2000
- Cleared for good
- 24 hadeforestation: turned into farms, mines or towns
The worst year was 2021, when about 3 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 | under 1 ha | under 1 ha | under 1 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | under 1 ha | under 1 ha | 1 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | 2 ha | under 1 ha | 2 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | 2 ha | 1 ha | 3 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | 1 ha | under 1 ha | 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | 2 ha | under 1 ha | 2 ha |
| 2019 | 2 ha | under 1 ha | 2 ha |
| 2020 | 1 ha | under 1 ha | 1 ha |
| 2021 | 3 ha | under 1 ha | 3 ha |
| 2022 | 3 ha | under 1 ha | 3 ha |
| 2023 | 2 ha | under 1 ha | 2 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Khon Kaen?
- Towns and roadscleared for good73% · 19 ha
- Farms, pasture and plantationscleared for good16% · 4 ha
- Storms, floods and other natural causescan grow back5.8% · 2 ha
Also: mining and energy, 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
- 3,370 ha
- Forest in 2020
- 3,770 ha
- Overall change
- +406 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Khon Kaen grew from about 3,370 hectares to 3,770 hectares, a net gain of about 406 hectares (+12%). New forest grew on about 574 hectares, while 168 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 Khon Kaen
Same 2 km radius, same index — so they compare directly.
- Udon Thani107.9 km
Thailand
- Tree cover
- 27%
- Air quality
- 52
- Vientiane170.8 km
Laos
- Tree cover
- 28%
- Air quality
- 85
- Nakhon Ratchasima181.8 km
Thailand
- Tree cover
- 24%
- Air quality
- 60
- Savannakhet206.1 km
Laos
- Tree cover
- 30%
- Air quality
- 55
- Thakhèk238.0 km
Laos
- Tree cover
- 50%
- Air quality
- 81
- Ubon Ratchathani254.1 km
Thailand
- Tree cover
- 30%
- Air quality
- 42
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Frequently asked
Questions about Khon Kaen
What is the air quality (AQI) in Khon Kaen right now?
The latest reading for Khon Kaen shows an AQI of 64 (Moderate), measured Nov 12, 00:00 local time by the Hydrogeological Group Water Resources Regional Office4 khonkaen ground monitoring station, 300 m away, via OpenAQ. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Khon Kaen today?
At AQI 64 (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 Khon Kaen been like this week?
Over the last 7 days, the CAMS air-quality model put Khon Kaen's daily AQI at 36 on average, from 21 on Nov 10 to an hourly peak of 62 on Nov 6. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Khon Kaen lost since 2001?
Since 2001, the area within 10 km of Khon Kaen has lost about 26 hectares of forest (about 36 football pitches): 14% of the forest it had in 2000. Most of it (91%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Khon Kaen grew from about 3,370 hectares to 3,770 hectares, a net gain of about 406 hectares (+12%). New forest grew on about 574 hectares, while 168 hectares were lost.
What is the tree count in Khon Kaen?
Khon Kaen has an estimated 94,381 trees across the 12.38 km² of land measured — 30.5% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Khon Kaen need?
Khon Kaen has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Khon Kaen's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Nai Mueang, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. 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 Nai Mueang; the tree count is an estimate derived from that cover.
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