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 µg/m³ 50 µg/m³0
Every city in Thailand ranked for January 2025, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1Tha BoNong Khai
    8
  2. 2Nong KhaemBangkok
    7
  3. 2Khlong Sam WaBangkok
    7
  4. 4Bueng KumBangkok
    6
  5. 5Khan Na YaoBangkok
    6
  6. 6Lat KrabangBangkok
    6
  7. 7Lak SiBangkok
    6
  8. 8Bang NaBangkok
    6
  9. 9Nong ChokBangkok
    6
  10. 10Ban Samae DamBangkok
    6
  11. 11Bang KapiBangkok
    5
  12. 12BangkokBangkok
    5
  13. 12Ban Khlong PrawetBangkok
    5
  14. 12Sai MaiBangkok
    5
  15. 15Mueang NonthaburiNonthaburi
    5
  16. 16Saphan SungBangkok
    5
Low1–3
Moderate4–6
High7–9
Very high10

The UK's Daily Air Quality Index (1 to 10), PM2.5 bands. 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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