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 15 Dec 2024: Tuen Mun 28.6 µg/m³, Wan Chai 25.7 µg/m³ and Tin Shui Wai 23.8 µg/m³.
- 1Tuen MunTuen Mun28.6
- 2Wan ChaiWan Chai25.7
- 3Tin Shui WaiYuen Long23.8
- 4FanlingNorth District21.8
- 5San Tung Chung HangIslands21.2
- 6Mong KokYau Tsim Mong District20.5
- 7Tai PoTai Po20.3
- 8Kwai ChungKwai Tsing District19.5
- 9Tsuen WanTsuen Wan17.8
- 10Sham Shui PoSham Shui Po District17.7
- 11VictoriaCentral and Western16.9
- 12Sau Mau PingKwun Tong District16.2
- 13Sha TinSha Tin15.7
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.