Air quality in Tsz Wan Shan estimated
Wong Tai Sin District, Hong Kong. No ground monitor we can use is in this city, so these numbers are model estimates, not measurements.
≈ 10 µg/m³
Moderate
Estimated PM2.5, 7-day average to 2026-09-30, about 0.6× the WHO 24-hour guideline. 30-day average ≈ 11 µg/m³.
Model estimate from the Copernicus Atmosphere Monitoring Service (CAMS), scaled by 0.51 to match 10 measured cities within 300 km over the last week. Adjusted this way, a single day lands within ×1.5 of what a monitor would read about two times in three: a guide, not a measurement. Not ranked on SmogRank's boards.
Last 30 days, estimated
Daily means, UTC days. Dashed line: WHO 24-hour guideline (15 µg/m³).
Measured cities nearby
| City | Distance | 7-day average |
|---|---|---|
| Sha Tin | 4 km | 9.1 µg/m³ |
| Mong Kok | 5 km | 11.6 µg/m³ |
| Sham Shui Po | 5 km | 11.7 µg/m³ |
| Sau Mau Ping | 5 km | 12.0 µg/m³ |
| Kwai Chung | 7 km | 12.3 µg/m³ |
| Wan Chai | 8 km | 18.3 µg/m³ |
Estimates contain modified Copernicus Atmosphere Monitoring Service information 2026. How estimates are made.