PHILADELPHIA (WPVI) -- With smoke blowing into the Philadelphia region from the wildfires in Canada, you may have heard a lot about the Air Quality Index or AQI. But what it is, exactly? The Air ...

Residents can monitor air quality through resources like the MiAir Quality Index Dashboard and AirNow. The Air Quality Index (AQI) uses a color-coded system to inform the public about air quality ...

Delhi's air quality has plunged back into the 'very poor' category, with the AQI reaching 331 on Tuesday. Several areas ...

Amid rapidly worsening air quality in Mumbai, the Brihanmumbai Municipal Corporation (BMC) has begun enforcing stringent ...