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 9 May 2026: Wan Chai 21.7 µg/m³, Tuen Mun 17.5 µg/m³ and Fanling 15.5 µg/m³.
- 1Wan ChaiWan Chai21.7
- 2Tuen MunTuen Mun17.5
- 3FanlingNorth District15.5
- 4Tin Shui WaiYuen Long14.9
- 5Sham Shui PoSham Shui Po District14.9
- 6Kwai ChungKwai Tsing District14.9
- 7Sau Mau PingKwun Tong District14.6
- 8San Tung Chung HangIslands14.6
- 9Mong KokYau Tsim Mong District14.5
- 10Tai PoTai Po14.3
- 11VictoriaCentral and Western13.8
- 12Tsuen WanTsuen Wan13.7
- 13Sha TinSha Tin12.3
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.