SmogRank / World / Hong Kong / October 2025

Most polluted cities in Hong Kong, October 2025

13 cities in Hong Kong ranked by their average PM2.5 over the 31 days. Worst: Wan Chai at 21.4 µg/m³, #256 of 2,296 cities in the world. Cleanest: Victoria at 10.7. A city needs measurements on 70% of the days to be ranked.

← Wan Chai 21.4 µg/m³ 20 µg/m³0
Every city in Hong Kong ranked for October 2025, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1Wan ChaiWan Chai
    74
  2. 2Tuen MunTuen Mun
    64
  3. 3Tin Shui WaiYuen Long
    62
  4. 4San Tung Chung HangIslands
    61
  5. 5FanlingNorth District
    61
  6. 6Tai PoTai Po
    59
  7. 7Mong KokYau Tsim Mong District
    58
  8. 8Sham Shui PoSham Shui Po District
    58
  9. 9Kwai ChungKwai Tsing District
    58
  10. 10Tsuen WanTsuen Wan
    57
  11. 11Sau Mau PingKwun Tong District
    56
  12. 12Sha TinSha Tin
    55
  13. 13VictoriaCentral and Western
    54
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, October 2025 · Hong Kong now

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SmogRank, most polluted cities in Hong Kong, PM2.5, October 2025, smogrank.com/hk/history/2025-10 (accessed 2 Oct 2026).

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