SmogRank / World / Taiwan / Taiwan / May 2026

Most polluted cities in Taiwan, Taiwan, May 2026

36 cities in Taiwan, Taiwan ranked by their average PM2.5 over the 31 days. Worst: Douliu at 15.8 µg/m³, #393 of 2,852 cities in the world. Cleanest: Hengchun at 6.1. 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.

← Douliu 0% 0.75%0
Every city in Taiwan, Taiwan ranked for May 2026, 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. 1Douliu
    0%
  2. 2Erlun
    0%
  3. 3Yuanlin
    0%
  4. 4Nantou
    0%
  5. 4Zhushan
    0%
  6. 6Erlin
    0%
  7. 6Changhua
    0%
  8. 8Beigang
    0%
  9. 9Taichung
    0%
  10. 10Zhongliao
    0%
  11. 11Chiayi City
    0%
  12. 12Yongkang
    0%
  13. 13Tainan
    0%
  14. 13Buzi
    0%
  15. 15Chaozhou
    0%
  16. 16Xinying
    0%
  17. 17Taibao
    0%
  18. 17Puli
    0%
  19. 19Xizhou
    0%
  20. 20Miaoli
    0%
  21. 21Lugu
    0%
  22. 22Toufen
    0%
  23. 23Magong
    0%
  24. 24Neili
    0%
  25. 25Taipei
    0%
  26. 26Daxi
    0%
  27. 27Zhudong
    0%
  28. 28Shenzhen
    0%
  29. 29Yilan
    0%
  30. 29Taoyuan
    0%
  31. 31Keelung
    0%
  32. 32Hsinchu
    0%
  33. 33Taitung
    0%
  34. 34Hualien City
    0%
  35. 35Guanshan
    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, May 2026 · All cities in Taiwan, May 2026 · Taiwan now

Use this board

SmogRank, most polluted cities in Taiwan, Taiwan, PM2.5, May 2026, smogrank.com/tw/region/taiwan/history/2026-05 (accessed 6 Oct 2026).

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.