THAIJAMES Posted January 15, 2018 Share Posted January 15, 2018 For more than a year now the index at http://aqicn.org/ has been showing high levels of pm 2.5. For example today in Chiang mai the level is 101 - Unhealthy. but as I look out at the window, doi suthep is very clear and the air around generally looks clear with very good visibility. I have a pm 2.5 sensor at home and it shows around 35-40 (healthy) Are the aqicn.org sensors right on major intersections or am I missing something? Link to comment Share on other sites More sharing options...
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