February 24, 20197 yr KK is technically Isaan. But as you drive north of Bangkok air quality gets progressively worse. It's all relative; air is bad, just a matter of how bad. Nowhere is good for health conscious people. The "far north" like Chiang Mai, Chaing Rai, and Mae Hong Son does tend to peg the needle for the worst air of all of Thailand. x Air quality picture today. KK is 164. CM area 180 or so. Bangkok 65 or so. Lower numbers are better. Red/purple are more serious concerns.
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