SmogRank / Hong Kong

Air quality in Sai Kung estimated

Sai Kung District, Hong Kong. No ground monitor we can use is in this city, so these numbers are model estimates, not measurements.

≈ 9 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 0.50 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

152026-09-01: ≈ 5 µg/m³ (estimate)09-012026-09-02: ≈ 8 µg/m³ (estimate)2026-09-03: ≈ 9 µg/m³ (estimate)2026-09-04: ≈ 14 µg/m³ (estimate)2026-09-05: ≈ 14 µg/m³ (estimate)2026-09-06: ≈ 9 µg/m³ (estimate)2026-09-07: ≈ 11 µg/m³ (estimate)2026-09-08: ≈ 15 µg/m³ (estimate)09-082026-09-09: ≈ 12 µg/m³ (estimate)2026-09-10: ≈ 11 µg/m³ (estimate)2026-09-11: ≈ 11 µg/m³ (estimate)2026-09-12: ≈ 8 µg/m³ (estimate)2026-09-13: ≈ 7 µg/m³ (estimate)2026-09-14: ≈ 8 µg/m³ (estimate)2026-09-15: ≈ 9 µg/m³ (estimate)09-152026-09-16: ≈ 13 µg/m³ (estimate)2026-09-17: ≈ 12 µg/m³ (estimate)2026-09-18: ≈ 11 µg/m³ (estimate)2026-09-19: ≈ 12 µg/m³ (estimate)2026-09-20: ≈ 15 µg/m³ (estimate)2026-09-21: ≈ 17 µg/m³ (estimate)2026-09-22: ≈ 10 µg/m³ (estimate)09-222026-09-23: ≈ 13 µg/m³ (estimate)2026-09-24: ≈ 12 µg/m³ (estimate)2026-09-25: ≈ 12 µg/m³ (estimate)2026-09-26: ≈ 11 µg/m³ (estimate)2026-09-27: ≈ 7 µg/m³ (estimate)2026-09-28: ≈ 8 µg/m³ (estimate)2026-09-29: ≈ 8 µg/m³ (estimate)09-292026-09-30: ≈ 8 µg/m³ (estimate)

Daily means, UTC days. Dashed line: WHO 24-hour guideline (15 µg/m³).

Measured cities nearby

CityDistance7-day average
Sau Mau Ping8 km12.0 µg/m³
Sha Tin9 km9.1 µg/m³
Mong Kok12 km11.6 µg/m³
Sham Shui Po13 km11.7 µg/m³
Tai Po13 km13.0 µg/m³
Kwai Chung13 km12.3 µg/m³

Estimates contain modified Copernicus Atmosphere Monitoring Service information 2026. How estimates are made.