As the chart shows, for PM2.5 concentrations up to 60 microgram per cubic metre (µg/m3), AQI increases by 1.67 for every 1µg/m3 increase in PM2.5 concentration.

Check real-time air quality in Los Angeles with this interactive map. Get up-to-date AQI readings, pollution levels, and health recommendations for neighborhoods across LA, Orange, San Bernardino ...

An air quality index above 150 is considered unhealthy for everyone. Above 300 is considered hazardous. On Wednesday, Big Bear’s AQI for fine particulate matter, or PM2.5, reached a breathtaking ...

A Chicago Air Quality Alert has been extended through Friday as smoke from Canada wildfires has pushed the AQI into unhealthy levels across the region. Latest U.S.

As the chart shows, for PM2.5 concentrations up to 60 microgram per cubic metre (µg/m3), AQI increases by 1.67 for every 1µg/m3 increase in PM2.5 concentration.