Air quality now
Air quality in Chicago
United States
Above WHO limits — NO₂ is 1.0× the WHO limit
🚬 Breathing this all day ≈ smoking 0.5 cigarettes
Each ball below is a pollutant measured in Chicago, sized against WHO safe limits — it's a snapshot of the air, not a map.
- PM2.511 µg/m³0.7×
- PM1011 µg/m³0.2×
- NO₂26 µg/m³1.0×
- O₃80 µg/m³0.8×
- SO₂6 µg/m³0.1×
- CO213 µg/m³0.1×
What you're seeing
Each ball is a pollutant measured in Chicagoright 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.