Cleanest Cities Today

Lyon currently has the best air quality among tracked cities with an AQI of 6. Low AQI values indicate minimal air pollution, meaning outdoor activities can be enjoyed safely without health concerns.

The World Health Organization recommends annual average PM2.5 levels below 15 µg/m³. Cities in this ranking typically benefit from favorable weather, low industrial emissions, geographic advantages, or effective environmental policies.

Air quality is dynamic and can change rapidly. This ranking updates hourly based on real-time monitoring data from OpenAQ. Click on any city for detailed pollution data including PM2.5, PM10, and 24-hour trend charts.