Air Quality Lab — Shek O, Hong Kong
Air Quality Profile·
Shek O reports an annual PM2.5 of 13.6 µg/m³. That's roughly double the WHO 2021 guideline but still far below the EU annual limit of 25 µg/m³.
Shek O
Hong Kong
Hong KongAnnual Average
FairWHO annual classification
13.6µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
2222 µg/m³ — Moderate
1313 µg/m³ — Fair
1717 µg/m³ — Moderate
1616 µg/m³ — Moderate
1111 µg/m³ — Fair
6.86.8 µg/m³ — Good
6.96.9 µg/m³ — Good
9.29.2 µg/m³ — Good
7.67.6 µg/m³ — Good
1414 µg/m³ — Fair
1717 µg/m³ — Moderate
2424 µg/m³ — Moderate
Jan
Feb
Mar
Apr
May
Jun
2222 µg/m³ — Moderate
1313 µg/m³ — Fair
1717 µg/m³ — Moderate
1616 µg/m³ — Moderate
1111 µg/m³ — Fair
6.86.8 µg/m³ — Good
Jul
Aug
Sep
Oct
Nov
Dec
6.96.9 µg/m³ — Good
9.29.2 µg/m³ — Good
7.67.6 µg/m³ — Good
1414 µg/m³ — Fair
1717 µg/m³ — Moderate
2424 µg/m³ — Moderate
Best months: Jun–Jul, SepWorst months: Jan, Nov–Dec
Good5–10 µg/m³Fair10–15 µg/m³Moderate15–25 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across Hong Kong
Shek O: 13.6 µg/m³. Typical range in Hong Kong: 13.6–15.8 µg/m³. Low anchor: Sai Kung, 13.1 µg/m³. High anchor: Tuen Mun, 19.8 µg/m³.
17 cities tracked