SmogRank / Cleaner or dirtier / Hong Kong
Hong Kong: cleaner or dirtier, 2024
In Hong Kong, 8 cities have enough days in both years to compare 2024 with the same days of 2023: 8 got dirtier and 0 cleaner.
The 8 cities that got dirtier, biggest rise first
| # | City | 2023 | 2024 | Change |
|---|---|---|---|---|
| 1 | Sham Shui PoSham Shui Po District, Hong Kong | 59 | 63 | +2.5 µg/m³+19% |
| 2 | Tai PoHong Kong | 61 | 66 | +2.4 µg/m³+17% |
| 3 | Wan ChaiHong Kong | 76 | 80 | +2.2 µg/m³+10% |
| 4 | Tsuen WanHong Kong | 62 | 65 | +1.5 µg/m³+10% |
| 5 | Sha TinHong Kong | 57 | 60 | +1.5 µg/m³+12% |
| 6 | Kwai ChungKwai Tsing District, Hong Kong | 62 | 65 | +1.5 µg/m³+10% |
| 7 | Mong KokYau Tsim Mong District, Hong Kong | 66 | 68 | +1.4 µg/m³+8% |
| 8 | Sau Mau PingKwun Tong District, Hong Kong | 60 | 62 | +0.9 µg/m³+6% |
Means in US AQI over the days a city was measured in both years, the same calendar days each year; a city needs 55% of the days paired, and at least 30. The change is in µg/m³ and per cent. How we compare.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
Updated 2026-10-07 12:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.