Air quality monitors also only measure the air in their general vicinity so you may want to consider more than one. Some send real-time alerts but not all of them do. If not, you’ll need to ...

Purple air quality meters placed by members of Marsik's research team throughout Metro Detroit measured some areas in the 200s on Thursday afternoon – a "very unhealthy" air quality level ...

The EPA’s Air Quality Index measures how clean or polluted the air is, with values ranging from 0-500. Higher AQI values mean there are greater levels of pollution in the air.

Those affected by wildfire smoke focus on the colors red, purple and maroon on the air quality charts. Red used to be the scariest color. Why did that change?(Story aired on ATC on June 28, 2023.) ...