SmogRank / History / City race

Cities in Thailand, worst air first, day by day

Each measured city's average over the 30 days to every day since January 2023, worst first. Find your own city to follow it through the race, or keep to one country.

CountriesCities
The 30 days to21 Jun 2024 That day's board

The worst cities in Thailand for PM2.5 over the 30 days to 21 Jun 2024: Mukdahan 27.4 µg/m³, Nan 21.2 µg/m³ and Kanchanaburi 21.1 µg/m³.

  1. 1MukdahanMukdahan27.4
  2. 2NanNan21.2
  3. 3KanchanaburiKanchanaburi21.1
  4. 4Nong KhaemBangkok17.2
  5. 5KalasinKalasin16.5
  6. 6Mae SaiChiang Rai15.7
  7. 7Nakhon RatchasimaNakhon Ratchasima15.7
  8. 8YasothonYasothon15.2
  9. 9Saphan SungBangkok15.1
  10. 10Si Maha PhotPrachin Buri15.0
  11. 11PhuketPhuket14.0
  12. 12Khan Na YaoBangkok13.9
  13. 13RatchaburiRatchaburi13.6
  14. 14BangkokBangkok13.5
  15. 15Hat YaiSongkhla13.4
  16. 16Lak SiBangkok13.4
  17. 17TratTrat13.3
  18. 18PattaniPattani13.2
  19. 19Amnat CharoenAmnat Charoen13.2
  20. 20Ubon RatchathaniUbon Ratchathani13.0

+ 51 more cities, 13.0 µg/m³ and below

Not counted on this day, too few days measured: Ban Samae Dam since 19 Jun 2024, Bang Na since 16 Jun 2024, Khon Kaen since 12 Jun 2024 and 6 more cities.

30 days7 days
GoodModerateSensitive groupsUnhealthyVery unhealthyHazardousWHO 24-hour guideline, 15 µg/m³Fades where it stood: not counted that day

A city's number is its average over the 30 days, shown only when 21 of them were measured (5 of 7 on the 7-day race), the same minimum as the 30- and 7-day boards. A city whose monitors go quiet fades out where it stood rather than sliding down, so a gap never reads as cleaner air. Some large countries are thin or missing because their monitors' licences don't allow reuse. How we rank.

Not covered: the government monitoring networks of China and Turkey, which publish only on their own websites; we are building the readers for them. Most cities there are missing from this board, not clean. Why.