Chiang Mai Air Quality Index
Chiang Mai, Thailand · Real-time AQI data
Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
Pollutant Breakdown
PM2.5
82µg/m³
PM10
42µg/m³
O₃
38.6ppm
NO₂
12.8ppb
SO₂
4.1ppb
CO
3.7ppm
Station: Shanghai (上海) · Mar 20, 05:00 PM · Updates every 30 min
Health Recommendations
Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
How does Chiang Mai compare to other cities?
Compare →AQI Scale Reference
About Air Quality in Chiang Mai
The Air Quality Index (AQI) in Chiang Mai is measured using monitoring stations that track six key pollutants: PM2.5, PM10, ground-level ozone, nitrogen dioxide, sulfur dioxide, and carbon monoxide. The AQI is calculated using US EPA standards and ranges from 0 (excellent) to 500 (hazardous).
PM2.5 is typically the dominant pollutant in Chiang Mai during high-pollution periods. Fine particulate matter from traffic, industry, and seasonal factors can push AQI above 150, which is considered unhealthy for all groups.
Check the health effects guide to understand what today's AQI means for your activity level, or see the global AQI rankings to compare Chiang Mai with other cities worldwide.