SmogRank / World / Taiwan / Taiwan / April 2025

Most polluted cities in Taiwan, Taiwan, April 2025

36 cities in Taiwan, Taiwan ranked by their average PM2.5 over the 30 days. Worst: Erlun at 23.2 µg/m³, #264 of 2,896 cities in the world. Cleanest: Hengchun at 9.8. A city needs measurements on 70% of the days to be ranked.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

← Erlun 4% 4%0
Every city in Taiwan, Taiwan ranked for April 2025, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Erlun
    4%
  2. 2Douliu
    0%
  3. 2Yuanlin
    0%
  4. 4Taibao
    0%
  5. 5Buzi
    0%
  6. 5Erlin
    0%
  7. 7Taoyuan
    0%
  8. 8Shenzhen
    0%
  9. 9Yongkang
    0%
  10. 9Taichung
    0%
  11. 9Hsinchu
    0%
  12. 12Neili
    0%
  13. 12Zhongliao
    0%
  14. 14Nantou
    0%
  15. 15Xinying
    0%
  16. 15Beigang
    0%
  17. 17Tainan
    0%
  18. 17Zhushan
    0%
  19. 19Xizhou
    0%
  20. 20Taipei
    0%
  21. 21Changhua
    0%
  22. 22Chaozhou
    0%
  23. 23Toufen
    0%
  24. 24Chiayi City
    0%
  25. 25Daxi
    0%
  26. 26Puli
    0%
  27. 27Miaoli
    0%
  28. 28Magong
    0%
  29. 29Zhudong
    0%
  30. 30Yujing
    0%
  31. 31Keelung
    0%
  32. 32Yilan
    0%
  33. 33Guanshan
    0%
  34. 34Hualien City
    0%
  35. 35Taitung
    0%
  36. 36Hengchun
    0%
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, April 2025 · All cities in Taiwan, April 2025 · Taiwan now

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SmogRank, most polluted cities in Taiwan, Taiwan, PM2.5, April 2025, smogrank.com/tw/region/taiwan/history/2025-04 (accessed 6 Oct 2026).

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