SmogRank / World / Taiwan / Taiwan / May 2025

Most polluted cities in Taiwan, Taiwan, May 2025

37 cities in Taiwan, Taiwan ranked by their average PM2.5 over the 31 days. Worst: Taoyuan at 13.8 µg/m³, #448 of 2,771 cities in the world. Cleanest: Hengchun at 4.2. 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.

← Taoyuan 0% 0.75%0
Every city in Taiwan, Taiwan ranked for May 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. 1Taoyuan
    0%
  2. 2Yuanlin
    0%
  3. 3Daxi
    0%
  4. 3Erlun
    0%
  5. 5Douliu
    0%
  6. 5Erlin
    0%
  7. 7Shenzhen
    0%
  8. 8Taipei
    0%
  9. 9Taibao
    0%
  10. 9Neili
    0%
  11. 11Taichung
    0%
  12. 12Zhushan
    0%
  13. 13Toufen
    0%
  14. 13Hsinchu
    0%
  15. 13Zhongliao
    0%
  16. 16Yongkang
    0%
  17. 16Tainan
    0%
  18. 16Buzi
    0%
  19. 16Beigang
    0%
  20. 20Nantou
    0%
  21. 21Xinying
    0%
  22. 21Chiayi City
    0%
  23. 21Changhua
    0%
  24. 24Zhudong
    0%
  25. 25Yilan
    0%
  26. 26Miaoli
    0%
  27. 26Keelung
    0%
  28. 28Puli
    0%
  29. 28Xizhou
    0%
  30. 30Chaozhou
    0%
  31. 31Lugu
    0%
  32. 32Magong
    0%
  33. 33Yujing
    0%
  34. 33Hualien City
    0%
  35. 35Guanshan
    0%
  36. 36Taitung
    0%
  37. 37Hengchun
    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, May 2025 · All cities in Taiwan, May 2025 · Taiwan now

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SmogRank, most polluted cities in Taiwan, Taiwan, PM2.5, May 2025, smogrank.com/tw/region/taiwan/history/2025-05 (accessed 7 Oct 2026).

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