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 24 Dec 2023: Wan Chai 29.5 µg/m³, Tuen Mun 28.2 µg/m³ and Tin Shui Wai 23.0 µg/m³.
- 1Wan ChaiWan Chai29.5
- 2Tuen MunTuen Mun28.2
- 3Tin Shui WaiYuen Long23.0
- 4Mong KokYau Tsim Mong District22.8
- 5Tai PoTai Po22.4
- 6VictoriaCentral and Western21.1
- 7Tsuen WanTsuen Wan20.4
- 8Sham Shui PoSham Shui Po District20.3
- 9Kwai ChungKwai Tsing District20.3
- 10Sau Mau PingKwun Tong District20.1
- 11FanlingNorth District19.8
- 12Sha TinSha Tin19.5
- 13San Tung Chung HangIslands15.1
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.