As of this weekend, Chiang Mai and Bangkok were listed as the second and seventh worst cities in the world, respectively, in terms of air quality by air-pollution monitoring website IQAir.
By 7pm Chiang Mai topped the list, again.
IQAir ranks the world’s major cities by air pollution, with readings above 101 labelled unhealthy.
The IQAir scale has six categories: 0-50 (good air quality), 51-100 (intermediate), 101-150 (unhealthy for some groups), 151-200 (unhealthy), 201-300 (very unhealthy), and over 301 (hazardous).
Air quality in Chiang Mai at noon today was rated 226. It Bangkok it was rated 116 at the same time.
By 7pm on Saturday (April 15), Chiang Mai topped the list of most polluted cities in the world.
The 10 cities with the worst air pollution in the world as of noon Saturday were: Dhaka, Bangladesh – 283, Chiang Mai – 226, Delhi, India – 211,
Kathmandu, Nepal – 188, Lahore, Pakistan – 165, Wuhan, China – 161, Bangkok – 161, Shenyang, China – 159, Kolkata, India – 158, Hanoi, Vietnam – 155. – The Nation Thailand/ANN
Source: The Star