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 Nov 2024: Wan Chai 26.0 µg/m³, Tuen Mun 24.3 µg/m³ and Tin Shui Wai 21.5 µg/m³.
- 1Wan ChaiWan Chai26.0
- 2Tuen MunTuen Mun24.3
- 3Tin Shui WaiYuen Long21.5
- 4San Tung Chung HangIslands21.4
- 5FanlingNorth District20.9
- 6Mong KokYau Tsim Mong District19.1
- 7Tai PoTai Po18.7
- 8Tsuen WanTsuen Wan17.8
- 9Kwai ChungKwai Tsing District17.7
- 10Sham Shui PoSham Shui Po District16.4
- 11VictoriaCentral and Western15.3
- 12Sau Mau PingKwun Tong District15.2
- 13Sha TinSha Tin14.4
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.