Posted: Jun 4, 2025 / 06:55 PM CDT Updated: Jun 4, 2025 / 06:55 PM CDT The U.S. Air Quality Index (AQI) is the Environmental Protection Agency’s tool for reporting outdoor air quality and health.

A little before 1 p.m., Apple’s weather app showed the Air Quality Index at a very hazardous 486. Apple At those levels, people are advised to stay indoors, and Madeline Blair, 24, did just that.

The Air Quality Index (AQI) uses a color-coded scale to inform the public about air pollution levels and potential health risks. Michigan residents can check the AQI through various online ...

As of early Friday morning, the Air Quality Index for Chicago was reporting a PM2.5 of 116, which ranked in the "unhealthy for sensitive groups" category and level two of six on the Environmental ...