Chiang Mai is still choked by smoke from forest fires. The PM 2.5 level has exceeded safe levels in 25 districts for a total of 37 days now since January 1st 2025. Ban On School in Chiang Dao was found to have the worst PM2.5 level with 600 micrograms per cubic meter while other areas were choked by PM2.5 dust, measured at 100-200 micrograms per cubic meter, which exceed the standard and have a