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 8 Feb 2026: Tuen Mun 31.5 µg/m³, Wan Chai 30.7 µg/m³ and Tin Shui Wai 28.4 µg/m³.
- 1Tuen MunTuen Mun31.5
- 2Wan ChaiWan Chai30.7
- 3Tin Shui WaiYuen Long28.4
- 4FanlingNorth District28.1
- 5San Tung Chung HangIslands26.9
- 6Sham Shui PoSham Shui Po District25.9
- 7Mong KokYau Tsim Mong District25.5
- 8VictoriaCentral and Western25.3
- 9Tai PoTai Po24.8
- 10Kwai ChungKwai Tsing District24.1
- 11Tsuen WanTsuen Wan23.5
- 12Sau Mau PingKwun Tong District22.4
- 13Sha TinSha Tin21.8
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.