Bangkok
2 km around Sao Chingcha
Air quality now
AQI 57
11.7%
tree cover
52.1K more trees would reach 30% tree cover
Asia · air quality report · 31 cities
Thailand air quality today The AQI right now, city by city
Right now the 31 cities Airleaf measures in Thailand average AQI 54 (moderate). The worst air is in Nakhon Pathom, at AQI 119, and the cleanest in Ubon Ratchathani, at AQI 37.
At ground stations alone, which measure rather than estimate, the average is AQI 58 across 28 cities. 3% of the 31 measured cities are over AQI 100 today, where the air stops being fine for sensitive groups, and 23% have Good air.
Average right now
AQI 54
Moderate
US EPA index, across 31 cities
- cities measured
- 31
- worst air: Nakhon Pathom
- 119
- cleanest air: Ubon Ratchathani
- 37
- average tree cover
- 32.7%
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Thailand · average AQI 54
Air quality right now in the 8 largest cities in Thailand
Moderate
Chon Buri
2 km around Bang Pla Soi
Air quality now
AQI 66
22.3%
tree cover
18.7K more trees would reach 30% tree cover
Hat Yai
2 km around Hat Yai
Air quality now
AQI 40
15.0%
tree cover
47.1K more trees would reach 30% tree cover
Latkrabang
2 km around Khlong Sam Prawet
Air quality now
AQI 56
36.7%
tree cover
Healthy tree cover
Lampang
2 km around Wiang Nuea
Air quality now
AQI 27
34.0%
tree cover
Healthy tree cover
Samut Prakan
2 km around Samut Prakan
Air quality now
AQI 60
31.2%
tree cover
Healthy tree cover
Mueang Nonthaburi
2 km around Bang Krasaw
Air quality now
AQI 55
30.7%
tree cover
Healthy tree cover
Phra Pradaeng
2 km around Talat
Air quality now
AQI 56
25.1%
tree cover
12.4K more trees would reach 30% tree cover
Across the country
How clean is the air across Thailand today?
3% of the 31 measured cities are over AQI 100 today, where the air stops being fine for sensitive groups, and 23% have Good air. Unusually sensitive people should consider limiting long outdoor exertion.
31 measured cities
- Good7 (23%)
- Moderate23 (74%)
- Unhealthy for sensitive groups1 (3%)
Every measured city, including model estimates where no ground station is near.
In aggregate
Thailand in numbers
Every figure below is read the same way over the same 2 km area per city, so they add up and compare like for like. Averaged across the 31 of 31 cities measured so far in Thailand.
- Average air quality
- AQI 54Mean of the latest reading per city
- Average tree cover
- 32.7%13 of 31 below their target
- Trees counted
- 3.0MAcross every measured area
- More trees needed
- 286KTo bring each area to its target
Worst air quality right now
Cleanest air right now
Greenest cities in Thailand
Least tree cover in Thailand
Excludes barren and desert sites
Against everywhere else
How does Thailand compare with other countries?
Right now the cities of Thailand average cleaner air than 45% of the 171 countries Airleaf has enough cities to average, and more tree cover than 73%.
Cleaner air than…
- Thailand
- Beats 45%
More tree cover than…
- Thailand
- Beats 73%
See the most polluted and cleanest air rankings for every country.
Deforestation · 2001–2025
How much forest has Thailand lost?
Since 2001, Thailand has lost about 2.84 million hectares of forest (about 28,000 km²): 14% of the forest it had in 2000. Most of it (88%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
- Forest lost since 2001
- 2.84 million haabout 28,000 km²
- Share of its forest
- 14%of what there was in 2000
- Cleared for good
- 2.49 million hadeforestation: turned into farms, mines or towns
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 33,400 ha | 2,910 ha | 36,300 ha |
| 2002 | 56,300 ha | 4,920 ha | 61,200 ha |
| 2003 | 53,200 ha | 5,460 ha | 58,600 ha |
| 2004 | 84,400 ha | 8,180 ha | 92,600 ha |
| 2005 | 76,700 ha | 7,830 ha | 84,500 ha |
| 2006 | 92,800 ha | 8,000 ha | 101,000 ha |
| 2007 | 83,700 ha | 10,200 ha | 93,900 ha |
| 2008 | 74,000 ha | 6,730 ha | 80,700 ha |
| 2009 | 121,000 ha | 12,200 ha | 133,000 ha |
| 2010 | 124,000 ha | 12,500 ha | 136,000 ha |
| 2011 | 87,500 ha | 8,070 ha | 95,500 ha |
| 2012 | 105,000 ha | 11,600 ha | 116,000 ha |
| 2013 | 69,800 ha | 16,300 ha | 86,100 ha |
| 2014 | 118,000 ha | 21,600 ha | 140,000 ha |
| 2015 | 103,000 ha | 19,600 ha | 123,000 ha |
| 2016 | 145,000 ha | 29,100 ha | 174,000 ha |
| 2017 | 175,000 ha | 23,500 ha | 199,000 ha |
| 2018 | 118,000 ha | 17,500 ha | 136,000 ha |
| 2019 | 113,000 ha | 19,300 ha | 132,000 ha |
| 2020 | 100,000 ha | 21,200 ha | 122,000 ha |
| 2021 | 107,000 ha | 17,100 ha | 124,000 ha |
| 2022 | 96,200 ha | 15,800 ha | 112,000 ha |
| 2023 | 127,000 ha | 17,100 ha | 144,000 ha |
| 2024 | 128,000 ha | 15,800 ha | 144,000 ha |
| 2025 | 98,500 ha | 14,500 ha | 113,000 ha |
Forest loss has stayed about the same: about 127,000 hectares a year in 2021–2025, against 152,000 hectares a year in 2016–2020. The worst year was 2017, when about 199,000 hectares of forest were lost.
What is causing deforestation in Thailand?
- Farms, pasture and plantationscleared for good86% · 2.45 million ha
- Shifting farmingcan grow back11% · 313,000 ha
Also: towns and roads, logging, mining and energy, storms, floods and other natural causes, wildfires, unknown causes.
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
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. How it's measured
Thailand as a whole
38.7% of Thailand was forested as of 2024, against a 30% benchmark. That already clears the benchmark — the city reports above show where cover is still thin locally. Source: World Bank (FAO).
Browse by province
- Bangkok9 cities
- Chiang MaiChiang Mai
- Chon Buri3 cities
- Khon KaenKhon Kaen
- LampangLampang
- Nakhon PathomNakhon Pathom
- Nakhon RatchasimaNakhon Ratchasima
- Nakhon Si ThammaratNakhon Si Thammarat
- NonthaburiMueang Nonthaburi
- Pathum ThaniKhlong Luang
- Prachin Buri2 cities
- Prachuap Khiri KhanHua Hin
- RatchaburiBan I Chang
- RayongRayong
- Samut Prakan2 cities
- SongkhlaHat Yai
- Surat ThaniSurat Thani
- Ubon RatchathaniUbon Ratchathani
- Udon ThaniUdon Thani
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Clean-air buying guides
Cleaner air at home in Thailand
Picked by tested clean-air delivery rate (CADR), noise and running cost, from independent test labels. No brand pays to be listed.
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NIOSH-approved N95 masks and P100 respirators for smog and smoke, and how to get the fit right. Cloth and surgical masks do little against PM2.5.
Frequently asked
Air quality in Thailand: your questions answered
What is the air quality in Thailand today?
Right now the 31 cities Airleaf measures in Thailand average AQI 54 (moderate). The worst air is in Nakhon Pathom, at AQI 119, and the cleanest in Ubon Ratchathani, at AQI 37. At ground stations alone, which measure rather than estimate, the average is AQI 58 across 28 cities. 3% of the 31 measured cities are over AQI 100 today, where the air stops being fine for sensitive groups, and 23% have Good air.
Which city in Thailand has the worst air right now?
Nakhon Pathom, at AQI 119 (Unhealthy for sensitive groups) on the US EPA index. Sensitive groups should limit long or intense outdoor activity.
Which city in Thailand has the cleanest air right now?
Ubon Ratchathani, at AQI 37 (Good). Both lists rank current readings, from ground stations wherever Thailand has at least three cities with one.
Is the air in Thailand safe to breathe today?
It depends on the city. 7 cities are Good, 23 cities are Moderate, 1 city is Unhealthy for sensitive groups. At the national average of AQI 54: Unusually sensitive people should consider limiting long outdoor exertion.
How much forest has Thailand lost since 2001?
About 2.84 million ha from 2001 to 2025, 14% of the forest it had in 2000, from the University of Maryland's yearly satellite maps of forest loss. 2.49 million ha of it was cleared for good, for farms, mines or towns.
Which city in Thailand has the most trees?
Kabin Buri, with 64.4% tree cover within 2 km of its center, measured from Sentinel-2 satellite images.
How does Airleaf measure air quality in Thailand?
Each city's reading is the US EPA air quality index, from ground monitoring stations where one has reported recently nearby, and from the CAMS atmospheric model elsewhere; each city's report says which. Tree cover is measured over the same 2 km radius in every city, so the cities compare like for like.
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