SmogRank / Cleaner or dirtier / Hong Kong
Hong Kong: cleaner or dirtier, 2026
In Hong Kong, 12 cities have enough days in both years to compare 2026 so far (1 January to 6 October) with the same days of 2025: 8 got dirtier and 4 cleaner.
The 8 cities that got dirtier, biggest rise first
| # | City | 2025 | 2026 | Change |
|---|---|---|---|---|
| 1 | Sham Shui PoSham Shui Po District, Hong Kong | 62 | 65 | +1.6 µg/m³+11% |
| 2 | Sau Mau PingKwun Tong District, Hong Kong | 61 | 63 | +1.4 µg/m³+10% |
| 3 | FanlingNorth District, Hong Kong | 65 | 67 | +1.4 µg/m³+8% |
| 4 | Sha TinHong Kong | 58 | 60 | +1.2 µg/m³+9% |
| 5 | VictoriaCentral and Western, Hong Kong | 60 | 62 | +0.9 µg/m³+6% |
| 6 | Kwai ChungKwai Tsing District, Hong Kong | 63 | 64 | +0.6 µg/m³+4% |
| 7 | Tin Shui WaiYuen Long, Hong Kong | 65 | 65 | +0.4 µg/m³+2% |
| 8 | Tai PoHong Kong | 63 | 63 | +0.2 µg/m³+1% |
The 4 cities that got cleaner, biggest fall first
| # | City | 2025 | 2026 | Change |
|---|---|---|---|---|
| 1 | Tsuen WanHong Kong | 63 | 62 | −0.8 µg/m³−5% |
| 2 | Mong KokYau Tsim Mong District, Hong Kong | 65 | 64 | −0.6 µg/m³−4% |
| 3 | Wan ChaiHong Kong | 78 | 77 | −0.4 µg/m³−2% |
| 4 | San Tung Chung HangIslands, Hong Kong | 65 | 65 | −0.2 µg/m³−1% |
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.