Air Quality Atlas

There are several detail maps of pollution in North Thailand that will give a better insight.
For Chiang Mai: Chiang Mai Air Pollution: Real-time Air Quality Index
For Chiang Rai: Mueang Chiang Rai Air Pollution: Real-time Air Quality Index

Several of the stations reporting in the North of Thailand are not government station but privately owned ones, like the Gaia's that the AQICN organization developed and of which a handful are reporting on their website from both CM and CR.
If anyone is interested in the details, put up a post and I try will explain a bit more.
 
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