SmogRank / World / Taiwan / Taiwan / 2025

Most polluted cities in Taiwan, Taiwan, 2025

25 cities in Taiwan, Taiwan ranked by their average PM2.5 over the 365 days; 25 above the WHO annual guideline (5.0 µg/m³). Worst: Douliu at 19.1 µg/m³, #255 of 2,624 cities in the world. Cleanest: Taitung at 6.8. 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.

← Douliu 6% 6%0
Every city in Taiwan, Taiwan ranked for 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. 1Douliu
    6%
  2. 2Tainan
    5%
  3. 3Yongkang
    5%
  4. 4Erlun
    4%
  5. 5Chaozhou
    4%
  6. 6Xinying
    4%
  7. 7Beigang
    4%
  8. 8Zhushan
    3%
  9. 9Zhongliao
    2%
  10. 10Erlin
    2%
  11. 11Yuanlin
    1%
  12. 12Shenzhen
    1%
  13. 13Magong
    1%
  14. 14Hsinchu
    1%
  15. 15Changhua
    1%
  16. 16Neili
    1%
  17. 17Toufen
    1%
  18. 18Taipei
    1%
  19. 19Taichung
    0%
  20. 20Taoyuan
    0%
  21. 21Miaoli
    0%
  22. 22Xizhou
    0%
  23. 23Zhudong
    0%
  24. 24Hualien City
    0%
  25. 25Taitung
    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, 2025 · All cities in Taiwan, 2025 · Taiwan now

Use this board

SmogRank, most polluted cities in Taiwan, Taiwan, PM2.5, 2025, smogrank.com/tw/region/taiwan/history/2025 (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.