The air quality index (AQI) (US standards) in Pattaya is being reported as 116 unhealthy for sensitive groups. Up in Chiang Mai, 162 AQI unhealthy.

IQAir AirVisual app is the reporting entity. Where is all the pollution coming from?

Australian bush fires.

Drifting down the coast from Bangkok?

https://fires.globalforestwatch.org/map/#activeLayers=viirsFires%2CactiveFires&activeBasemap=topo&activeImagery=&planetCategory=PLANET-MONTHLY&planetPeriod=Jan 0000&x=105.871065&y=11.593026&z=6

 

plus 

 

https://earth.nullschool.net/#current/wind/surface/level/orthographic=-256.00,12.33,2225

 

It's the usual "diesel cars" they've lighted up in SEA fields.

55 minutes ago, DrTuner said:

It's the usual "diesel cars" they've lighted up in SEA fields.

I thought the latest "excuse" was to much incense stick burning ?