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 10 Mar 2026: Wan Chai 22.8 µg/m³, Tuen Mun 22.6 µg/m³ and Fanling 22.1 µg/m³.
- 1Wan ChaiWan Chai22.8
- 2Tuen MunTuen Mun22.6
- 3FanlingNorth District22.1
- 4Sham Shui PoSham Shui Po District21.2
- 5Sau Mau PingKwun Tong District20.0
- 6Kwai ChungKwai Tsing District19.7
- 7Mong KokYau Tsim Mong District19.6
- 8Tin Shui WaiYuen Long19.1
- 9Tai PoTai Po18.7
- 10Tsuen WanTsuen Wan18.2
- 11San Tung Chung HangIslands17.5
- 12VictoriaCentral and Western17.3
- 13Sha TinSha Tin16.1
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.