Air Quality Index (AQI) in Hong Kong 🇭🇰
Live Air Quality Index (AQI) and PM2.5 Levels in Hong Kong
Currently, the Air Quality Index (AQI) in Hong Kong, the capital of Hong Kong, is measured at a score of 158. According to the US EPA health standard, this air quality rating is categorized as Unhealthy. The current atmosphere in Hong Kong is influenced by a PM2.5 (fine particulate matter) concentration of 66.1 µg/m³ and PM10 levels recorded at 66.8 µg/m³. Monitoring of gaseous pollutants shows Nitrogen Dioxide (NO2) at 124.5 µg/m³.
Beyond the primary urban hubs, atmospheric conditions and smog levels fluctuate across Hong Kong based on industrial output, traffic density, and local weather patterns. Real-time pollution data and respiratory health alerts are also being actively monitored in cities like Hong Kong, Kowloon, Victoria, Tuen Mun and Sha Tin. Tracking these air quality metrics is essential for residents nationwide to manage outdoor exposure and maintain respiratory safety during periods of increased particulate concentration.
Hong Kong Air Quality: Major Cities Index
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Pollution Monitor & AQI Forecast: Hong Kong Regions
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* Air Quality Index (AQI) data for Hong Kong is calculated using the US EPA standard. Information is processed from multiple monitoring stations detecting PM2.5, PM10, and gaseous pollutants to ensure accuracy for respiratory health planning.
Browse Air Quality in Hong Kong by cities in alphabetical order:
Frequently Asked Questions about Air Quality in Hong Kong
What is the air quality in Hong Kong right now?
The current AQI in Hong Kong (capital of Hong Kong) is 158 — categorised as Unhealthy. Conditions vary across the country — see AQI for all cities for a complete picture.
Which city in Hong Kong has the worst air quality right now?
Right now, Hong Kong has the highest AQI reading in Hong Kong at 158 (Unhealthy).
Which city in Hong Kong has the best air quality right now?
Kowloon currently has the lowest AQI in Hong Kong at 145 (Unhealthy (Sensitive)).
What is the PM2.5 level in Hong Kong today?
Is the air in Hong Kong safe to breathe today?
Most monitored cities in Hong Kong currently report unhealthy air-quality levels — outdoor activity should be limited, especially for sensitive groups.
What are the cleanest cities in Hong Kong right now?
Top 5 cities in Hong Kong with the best (lowest) AQI right now:
- Kowloon: AQI 145 — Unhealthy (Sensitive)
- Victoria: AQI 145 — Unhealthy (Sensitive)
- Tuen Mun: AQI 145 — Unhealthy (Sensitive)
- Sha Tin: AQI 145 — Unhealthy (Sensitive)
- Sham Shui Po: AQI 145 — Unhealthy (Sensitive)
What are the most polluted cities in Hong Kong right now?
Top 5 cities in Hong Kong with the worst (highest) AQI right now:
- Hong Kong: AQI 158 — Unhealthy
- Hong Kong: AQI 158 — Unhealthy
- Kowloon: AQI 145 — Unhealthy (Sensitive)
- Victoria: AQI 145 — Unhealthy (Sensitive)
- Tuen Mun: AQI 145 — Unhealthy (Sensitive)
Air Quality Scales & Resources
Wondering what these AQI numbers mean for your health? Our worldwide air quality guide explains every level of the AQI, PM2.5, PM10, ozone, NO2, CO and SO2 scales, with practical health advice for each range.
→ Understanding Air Quality Levels: read the full guide