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
    58.8
  2. 2Nong KhaemBangkok
    54.1
  3. 2Khlong Sam WaBangkok
    54.1
  4. 4Bueng KumBangkok
    51.5
  5. 5Khan Na YaoBangkok
    51.4
  6. 6Lat KrabangBangkok
    49.7
  7. 7Lak SiBangkok
    49.5
  8. 8Bang NaBangkok
    49.4
  9. 9Nong ChokBangkok
    48.5
  10. 10Ban Samae DamBangkok
    47.6
  11. 11Bang KapiBangkok
    47.4
  12. 12BangkokBangkok
    45.0
  13. 12Ban Khlong PrawetBangkok
    45.0
  14. 12Sai MaiBangkok
    45.0
  15. 15Mueang NonthaburiNonthaburi
    43.9
  16. 16Saphan SungBangkok
    43.6
Good0–5
Fair6–15
Moderate16–50
Poor51–90
Very poor91–140
Extremely poor141+

The European Environment Agency's air quality index bands for PM2.5 (2024 revision); it has bands, not numbers, so values stay in µg/m³. 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

Use this board

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

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.