SmogRank / World / Hong Kong / December 2025

Most polluted cities in Hong Kong, December 2025

13 cities in Hong Kong ranked by their average PM2.5 over the 31 days. Worst: Tuen Mun at 32.9 µg/m³, #357 of 2,638 cities in the world. Cleanest: Fanling at 22.8. A city needs measurements on 70% of the days to be ranked.

← Tuen Mun 32.9 µg/m³ 30 µg/m³0
Every city in Hong Kong ranked for December 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. 1Tuen MunTuen Mun
    95
  2. 2Wan ChaiWan Chai
    93
  3. 3Tin Shui WaiYuen Long
    90
  4. 4San Tung Chung HangIslands
    85
  5. 5Mong KokYau Tsim Mong District
    83
  6. 6Tai PoTai Po
    82
  7. 7Sham Shui PoSham Shui Po District
    81
  8. 8Kwai ChungKwai Tsing District
    80
  9. 9VictoriaCentral and Western
    78
  10. 10Tsuen WanTsuen Wan
    77
  11. 11Sau Mau PingKwun Tong District
    77
  12. 12Sha TinSha Tin
    77
  13. 12FanlingNorth District
    77
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, December 2025 · Hong Kong now

Use this board

SmogRank, most polluted cities in Hong Kong, PM2.5, December 2025, smogrank.com/hk/history/2025-12 (accessed 2 Oct 2026).

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.