Air quality now
Air quality in London
United Kingdom
Within WHO limits — O₃ is 0.6× the WHO limit
🚬 Breathing this all day ≈ smoking 0.3 cigarettes
Each ball below is a pollutant measured in London, sized against WHO safe limits — it's a snapshot of the air, not a map.
- PM2.56 µg/m³0.4×
- PM1013 µg/m³0.3×
- NO₂4 µg/m³0.2×
- O₃64 µg/m³0.6×
- SO₂1 µg/m³0.0×
- CO124 µg/m³0.0×
What you're seeing
Each ball is a pollutant measured in Londonright 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.