Hong Kong AQI: 65 (Moderate) - Real-Time Air Quality | AQI HQ

Hong Kong Air Quality Index

Hong Kong, Hong Kong · Real-time AQI data

Moderate

Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

Pollutant Breakdown

PM2.5

65µg/m³

PM10

29µg/m³

O₃

26.3ppm

NO₂

14.3ppb

SO₂

2.2ppb

1.6ppm

Station: Central, HongKong (中環) · Mar 18, 06:00 AM · Updates every 30 min

Health Recommendations

Moderate

Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

General Public: Air quality is acceptable for most people.

Children: Unusually sensitive children should limit prolonged outdoor play.

Heart Conditions: Unusually sensitive people should consider reducing exertion.

How does Hong Kong compare to other cities?

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AQI Scale Reference

0–50

Good

51–100

Moderate

101–150

Unhealthy for Sensitive Groups

151–200

Unhealthy

201–300

Very Unhealthy

301–500

Hazardous

About Air Quality in Hong Kong

The Air Quality Index (AQI) in Hong Kong is measured using monitoring stations that track six key pollutants: PM2.5, PM10, ground-level ozone, nitrogen dioxide, sulfur dioxide, and carbon monoxide. The AQI is calculated using US EPA standards and ranges from 0 (excellent) to 500 (hazardous).

PM2.5 is typically the dominant pollutant in Hong Kong during high-pollution periods. Fine particulate matter from traffic, industry, and seasonal factors can push AQI above 150, which is considered unhealthy for all groups.

Check the health effects guide to understand what today's AQI means for your activity level, or see the global AQI rankings to compare Hong Kong with other cities worldwide.