Air quality now
Air quality in Hong Kong
Hong Kong
Above WHO limits — NO₂ is 1.3× the WHO limit
- PM2.512 µg/m³0.8×
- PM1014 µg/m³0.3×
- NO₂33 µg/m³1.3×
- O₃57 µg/m³0.6×
- SO₂17 µg/m³0.4×
- CO153 µg/m³0.0×
What you're seeing
Each ball is a pollutant measured in Hong Kongright now. The more balls of a colour, the more of that pollutant is in the air — normalised against the World Health Organization's safe limits, so a hazy city looks unmistakably denser than a clean one. Data is live from Open-Meteo / CAMS. How Polly works →
Want your own city and a hay-fever pollen view? Open the live map, or track your symptoms against the air.