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 Apr 2024: Wan Chai 24.6 µg/m³, Tuen Mun 20.5 µg/m³ and Mong Kok 19.4 µg/m³.
- 1Wan ChaiWan Chai24.6
- 2Tuen MunTuen Mun20.5
- 3Mong KokYau Tsim Mong District19.4
- 4Sham Shui PoSham Shui Po District16.5
- 5Kwai ChungKwai Tsing District16.4
- 6Tai PoTai Po16.2
- 7San Tung Chung HangIslands16.1
- 8Tin Shui WaiYuen Long15.9
- 9Sha TinSha Tin14.3
- 10VictoriaCentral and Western14.1
Not counted on this day, too few days measured: Tsuen Wan since 26 Mar 2024, Sau Mau Ping since 23 Mar 2024 and Fanling since 22 Mar 2024.
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.