Chiang Mai air quality · Thailand
After rain, readings often drop sharply within an hour
US AQI 69 (Moderate) in Chiang Mai, from 3 PCD monitoring stations. Main pollutant: PM2.5.
Updated
Pollutants in Chiang Mai
- PM2.5 · µg/m³18.7Under WHO limit
- PM10 · µg/m³35.0Under WHO limit
Concentrations averaged across the city's stations. WHO multiples use the 2021 24-hour guidelines.
Is it safe outside in Chiang Mai right now?
Air quality is acceptable. People who are unusually sensitive to air pollution may feel effects with long or heavy exertion outdoors.
Walking and commuting
Go aheadFine for everyone.
Running and jogging
Take careFine for most; unusually sensitive people should ease the pace.
Cycling
Go aheadFine for everyone.
Children playing outside
Go aheadNo limits for most children.
Older adults and heart or lung conditions
Take careWatch for symptoms such as coughing or breathlessness.
Open windows
Go aheadFine to ventilate.
Mask outdoors
Not neededNot needed.
Air purifier indoors
Not neededOptional.
Based on the US EPA Air Quality Guide, applied to the current US AQI category. If you have symptoms, follow your doctor's advice.
What US AQI 51–100 means for your health →
Air quality by area in Chiang Mai
3 stations, worst first- City Hall, ChiangmaiModerate73
- Meteorological Staions, LamphunModerate67
- Yupparaj Wittayalai SchoolModerate67
Chiang Mai air quality history
Daily average, 35 days- 58average daily US AQI over 35 days
- 68worst day, 14 October
- 43cleanest day, 28 September
- 0days at Unhealthy or worse
The last 7 days averaged 65, worse than the week before (58). 4 of the last 35 days were Good.
Nearby cities
Thailand rankingChiang Mai air quality: common questions
What is the AQI in Chiang Mai right now?
The US AQI in Chiang Mai is 69 (Moderate), based on 3 monitoring stations. The main pollutant is PM2.5.
Is it safe to go outside in Chiang Mai today?
Fine for most people. Air quality is acceptable. People who are unusually sensitive to air pollution may feel effects with long or heavy exertion outdoors. For runners: Fine for most; unusually sensitive people should ease the pace.
Which area of Chiang Mai has the worst air right now?
City Hall, Chiangmai has the highest reading at 73 (Moderate). Yupparaj Wittayalai School has the lowest at 67, out of 3 stations reporting.
How has air quality in Chiang Mai been recently?
Over the last 35 days with data, Chiang Mai averaged US AQI 58. The worst day was 14 October at 68; the cleanest was 28 September at 43. 0 days were at Unhealthy or worse.
How does Chiang Mai's PM2.5 compare with the WHO guideline?
PM2.5 is 19 µg/m³, about 1.2 times the World Health Organization's 24-hour guideline of 15 µg/m³.
Where does Chiang Mai's air quality data come from?
From Pollution Control Department (PCD) · Air4Thai, using 3 monitoring stations in and around the city. Good Air does not estimate or adjust these readings.
Source: Pollution Control Department (PCD) · Air4Thai. Readings are published by the monitoring agency and may be revised.