Highest air pollution Hong Kong, today and tomorrow
Today (29 June): Air quality in Hong Kong is fair. PM1 is fair; AQI, NO2, and SO2 are medium; PM2.5, PM10, O3, CO, and HCHO are good. Pollution peaks around 12:00 AM (NO2: 44.9/100).
Tomorrow (30 June 2026): Air quality in Hong Kong is fair. SO2 increases to fair; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 8:00 PM (NO2: 43.4/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Hong Kong's air quality reflects the densely urbanised Kowloon Peninsula position adjacent to the former Kai Tak Airport site, with vehicle traffic on the surrounding Lung Cheung Road corridor and the concentrated urban commercial and residential character contributing elevated NOₓ. The harbour's limited waterway ventilation provides some maritime influence, while transboundary Pearl River Delta industrial pollution on northerly winds consistently elevates regional background PM2.5 throughout the year.
Today - 29 June | Pollution peaks at 00:00
AQI:
Medium
44.9/100
PM2.5 (fine particles):
Good
18.7/100
PM10 (coarse particles):
Good
5.1/100
NO2 (nitrogen dioxide):
Medium
44.9/100
O3 (ozone):
Good
19.1/100
SO2 (sulfur dioxide):
Medium
42.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.6/100
PM1 (ultrafine particles):
Fair
24.4/100
Levels show the poorest local air quality during the day
Tomorrow - 30 June | Pollution peaks at 20:00
AQI:
Medium
43.4/100
PM2.5 (fine particles):
Good
13.8/100
PM10 (coarse particles):
Good
3.9/100
NO2 (nitrogen dioxide):
Medium
43.4/100
O3 (ozone):
Good
16.1/100
SO2 (sulfur dioxide):
Fair
37.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.2/100
PM1 (ultrafine particles):
Good
18.5/100
Pollen forecast in Hong Kong
View pollen forecastFrequently Asked Questions
Is air quality bad in Hong Kong right now?
On 29 June 2026, overall air quality in Hong Kong is fair. PM1 is the main pollutant at 24.4/100. Pollution peaks around 12:00 AM (NO2: 44.9/100).
Will air quality be worse tomorrow in Hong Kong?
On 30 June 2026, air quality conditions in Hong Kong will be similar to today, with SO2 forecast at fair at 37.4/100. Pollution peaks around 8:00 PM (NO2: 43.4/100).
Are air quality levels in Hong Kong based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Check air quality in other popular cities:
Data provided by Airmine — Last update: 28 June 2026 at 18:36 CET (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team