AQI (Air Quality Index) is a standardized number that indicates how clean or polluted the air is and what health effects may be a concern.

What pollutants are included?

Common pollutants include PM2.5, PM10, NO2, SO2, CO, and O3, depending on data availability for each location.

How do I check a city?

Search for a city name (e.g., Seoul, London, Tokyo) and select a result to view real-time air quality and pollutant details.

Global Air Quality Monitoring

Search for any city worldwide to check air quality

Notification Settings

Alert when AQI is at least

Higher threshold means fewer alerts.