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 22 May 2024: Wan Chai 21.4 µg/m³, Tuen Mun 16.5 µg/m³ and Mong Kok 15.7 µg/m³.
- 1Wan ChaiWan Chai21.4
- 2Tuen MunTuen Mun16.5
- 3Mong KokYau Tsim Mong District15.7
- 4Tai PoTai Po13.4
- 5Tsuen WanTsuen Wan13.2
- 6Tin Shui WaiYuen Long13.1
- 7Sham Shui PoSham Shui Po District13.1
- 8San Tung Chung HangIslands12.8
- 9Kwai ChungKwai Tsing District12.8
- 10VictoriaCentral and Western11.7
- 11Sau Mau PingKwun Tong District11.6
- 12Sha TinSha Tin10.5
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.