SmogRank / Countries / Taiwan / September 2025

Most polluted cities in Taiwan, September 2025

42 cities in Taiwan ranked by their average PM2.5 over the 30 days. Worst: Yuanlin at 15.1 µg/m³, #207 of 2,439 cities in the world. Cleanest: Sanzhi at 4.6. A city needs measurements on 70% of the days to be ranked.

  1. 1YuanlinTaiwan
    15.1
  2. 2FengshanTakao
    13.8
  3. 3TaichungTaiwan
    13.7
  4. 4ErlunTaiwan
    13.5
  5. 5BuziTaiwan
    13.3
  6. 6DouliuTaiwan
    13.1
  7. 7ErlinTaiwan
    12.6
  8. 8ChanghuaTaiwan
    12.4
  9. 9DaxiTaiwan
    12.3
  10. 10NantouTaiwan
    12.1
  11. 11TaibaoTaiwan
    12.0
  12. 12BeigangTaiwan
    11.8
  13. 13JinchengFukien
    11.5
  14. 14XizhouTaiwan
    11.4
  15. 15ToufenTaiwan
    11.1
  16. 16ZhudongTaiwan
    11.0
  17. 17YongkangTaiwan
    10.4
  18. 17ZhubeiTaiwan
    10.4
  19. 19ZhushanTaiwan
    10.3
  20. 20ChaozhouTaiwan
    10.2
  21. 21MiaoliTaiwan
    10.1
  22. 21HsinchuTaiwan
    10.1
  23. 23ShulinTaipei
    10.0
  24. 24KaohsiungTakao
    9.9
  25. 25TainanTaiwan
    9.6
  26. 25NeiliTaiwan
    9.6
  27. 27XinyingTaiwan
    8.9
  28. 27PuliTaiwan
    8.9
  29. 29Chiayi CityTaiwan
    8.8
  30. 30LuguTaiwan
    8.6
  31. 31XizhiTaipei
    8.3
  32. 32TaoyuanTaiwan
    7.6
  33. 33New Taipei CityTaipei
    7.5
  34. 34TaipeiTaiwan
    6.9
  35. 35YujingTaiwan
    6.1
  36. 36YilanTaiwan
    6.0
  37. 37Hualien CityTaiwan
    5.8
  38. 38MagongTaiwan
    5.4
  39. 38HengchunTaiwan
    5.4
  40. 40KeelungTaiwan
    5.1
  41. 41TaitungTaiwan
    4.6
  42. 41SanzhiTaipei
    4.6
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

All cities in the world, September 2025 · Taiwan now

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SmogRank, most polluted cities in Taiwan, PM2.5, September 2025, smogrank.com/tw/history/2025-09 (accessed 2 Oct 2026).

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