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 Mar 2024: Wan Chai 29.5 µg/m³, Tuen Mun 25.8 µg/m³ and Mong Kok 23.6 µg/m³.
- 1Wan ChaiWan Chai29.5
- 2Tuen MunTuen Mun25.8
- 3Mong KokYau Tsim Mong District23.6
- 4Tsuen WanTsuen Wan19.9
- 5Tin Shui WaiYuen Long19.6
- 6Tai PoTai Po19.6
- 7VictoriaCentral and Western19.1
- 8Sham Shui PoSham Shui Po District19.0
- 9Kwai ChungKwai Tsing District17.5
- 10San Tung Chung HangIslands16.8
- 11FanlingNorth District16.0
- 12Sha TinSha Tin15.6
- 13Sau Mau PingKwun Tong District12.9
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.