Worst air pollution Vientiane, today and tomorrow
Today (10 August): Air quality in Vientiane is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (NO2: 25.8/100).
Tomorrow (11 August 2026): Air quality in Vientiane is fair. All pollutants stay as today. Pollution peaks around 11:00 PM (NO2: 27.5/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Vientiane's air quality reflects the flat Mekong River valley position adjacent to Thailand's Nong Khai, with vehicle traffic on Lane Xang Avenue and the surrounding construction, manufacturing, and agricultural operations contributing local sources. The Mekong's flat alluvial plain generally allows reasonable dispersal, while dry season agricultural and forest burning from February to April generates regional PM2.5 elevation across the broader Lower Mekong region and the wet season monsoon provides effective atmospheric cleansing throughout the year.
Today - 10 August | Pollution peaks at 23:00
AQI:
Fair
25.8/100
PM2.5 (fine particles):
Good
9.8/100
PM10 (coarse particles):
Good
2.6/100
NO2 (nitrogen dioxide):
Fair
25.8/100
O3 (ozone):
Fair
21.4/100
SO2 (sulfur dioxide):
Good
14.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.5/100
PM1 (ultrafine particles):
Good
14.0/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 23:00
AQI:
Fair
27.5/100
PM2.5 (fine particles):
Good
12.1/100
PM10 (coarse particles):
Good
3.3/100
NO2 (nitrogen dioxide):
Fair
27.5/100
O3 (ozone):
Fair
21.2/100
SO2 (sulfur dioxide):
Good
16.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.7/100
PM1 (ultrafine particles):
Good
17.1/100
Frequently Asked Questions
Is air quality bad in Vientiane right now?
On 10 August 2026, overall air quality in Vientiane is fair. AQI is the main air quality indicator at 25.8/100. Pollution peaks around 11:00 PM (NO2: 25.8/100).
Will air quality be worse tomorrow in Vientiane?
On 11 August 2026, air quality conditions in Vientiane will be similar to today, with AQI forecast at fair at 27.5/100. Pollution peaks around 11:00 PM (NO2: 27.5/100).
When is air pollution at its worst in Vientiane?
The biggest local contributors to pollution in Vientiane are traffic emissions, manufacturing activity, together with ongoing construction work, particularly once the drier season sets in. Rainfall through the monsoon usually keeps levels in check. The driest months of the year tend to see the highest readings.
Are air quality levels in Vientiane based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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