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 to18 Jun 2024 That day's board

The worst cities in Thailand for PM2.5 over the 30 days to 18 Jun 2024: Mukdahan 27.7 µg/m³, Nan 21.7 µg/m³ and Kanchanaburi 21.0 µg/m³.

  1. 1MukdahanMukdahan27.7
  2. 2NanNan21.7
  3. 3KanchanaburiKanchanaburi21.0
  4. 4Nong KhaemBangkok17.0
  5. 5Ban Samae DamBangkok16.8
  6. 6KalasinKalasin16.5
  7. 7Mae SaiChiang Rai16.4
  8. 8Nakhon RatchasimaNakhon Ratchasima15.8
  9. 9Saphan SungBangkok15.1
  10. 10YasothonYasothon14.5
  11. 11Si Maha PhotPrachin Buri14.5
  12. 12TratTrat14.4
  13. 13Khan Na YaoBangkok14.2
  14. 14Ubon RatchathaniUbon Ratchathani13.9
  15. 15PhuketPhuket13.8
  16. 16Hat YaiSongkhla13.7
  17. 17RatchaburiRatchaburi13.6
  18. 18BangkokBangkok13.5
  19. 19Lak SiBangkok13.5
  20. 20PattaniPattani13.2

+ 51 more cities, 13.1 µg/m³ and below

Not counted on this day, too few days measured: Surat Thani since 17 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.