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 20 Jan 2024: Tuen Mun 35.7 µg/m³, Wan Chai 34.7 µg/m³ and Tin Shui Wai 29.7 µg/m³.
- 1Tuen MunTuen Mun35.7
- 2Wan ChaiWan Chai34.7
- 3Tin Shui WaiYuen Long29.7
- 4Mong KokYau Tsim Mong District28.4
- 5VictoriaCentral and Western26.9
- 6Tsuen WanTsuen Wan26.3
- 7Sham Shui PoSham Shui Po District25.2
- 8Sau Mau PingKwun Tong District25.1
- 9Tai PoTai Po24.7
- 10Kwai ChungKwai Tsing District24.5
- 11Sha TinSha Tin23.0
- 12San Tung Chung HangIslands22.4
- 13FanlingNorth District20.3
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.