SmogRank / History / City race
Cities in Hong Kong, worst air first, day by day
Each measured city's average over the 30 days to every day since January 2023, worst first. Find your own city to follow it through the race, or keep to one country.
The worst cities in Hong Kong for PM2.5 over the 30 days to 12 May 2026: Wan Chai 22.6 µg/m³, Tuen Mun 18.3 µg/m³ and Fanling 16.2 µg/m³.
- 1Wan ChaiWan Chai22.6
- 2Tuen MunTuen Mun18.3
- 3FanlingNorth District16.2
- 4Tin Shui WaiYuen Long15.7
- 5Sham Shui PoSham Shui Po District15.6
- 6Mong KokYau Tsim Mong District15.6
- 7Kwai ChungKwai Tsing District15.5
- 8Sau Mau PingKwun Tong District15.4
- 9San Tung Chung HangIslands15.4
- 10Tai PoTai Po15.0
- 11VictoriaCentral and Western14.6
- 12Tsuen WanTsuen Wan14.5
- 13Sha TinSha Tin12.8
Cities counted each day
A city's number is its average over the 30 days, shown only when 21 of them were measured (5 of 7 on the 7-day race), the same minimum as the 30- and 7-day boards. A city whose monitors go quiet fades out where it stood rather than sliding down, so a gap never reads as cleaner air. Some large countries are thin or missing because their monitors' licences don't allow reuse. How we rank.
Not covered: the government monitoring networks of China and Turkey, which publish only on their own websites; we are building the readers for them. Most cities there are missing from this board, not clean. Why.