SmogRank / World / Thailand / January 2025

Most polluted cities in Thailand, January 2025

16 cities in Thailand ranked by their average PM2.5 over the 31 days. Worst: Tha Bo at 58.8 µg/m³, #23 of 2,121 cities in the world. Cleanest: Saphan Sung at 43.6. A city needs measurements on 70% of the days to be ranked.

← Tha Bo 58.8
Every city in Thailand ranked for January 2025, one column each, worst on the left and cleanest on the right. Point at it to read a city; tap to open it.
  1. 1Tha BoNong Khai
    153
  2. 2Nong KhaemBangkok
    147
  3. 2Khlong Sam WaBangkok
    147
  4. 4Bueng KumBangkok
    140
  5. 5Khan Na YaoBangkok
    140
  6. 6Lat KrabangBangkok
    136
  7. 7Lak SiBangkok
    135
  8. 8Bang NaBangkok
    135
  9. 9Nong ChokBangkok
    133
  10. 10Ban Samae DamBangkok
    131
  11. 11Bang KapiBangkok
    130
  12. 12BangkokBangkok
    124
  13. 12Ban Khlong PrawetBangkok
    124
  14. 12Sai MaiBangkok
    124
  15. 15Mueang NonthaburiNonthaburi
    122
  16. 16Saphan SungBangkok
    121
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, January 2025 · Thailand now

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SmogRank, most polluted cities in Thailand, PM2.5, January 2025, smogrank.com/th/history/2025-01 (accessed 2 Oct 2026).

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