USA Live Air Quality Index AQI Map Now & Today
A live AQI map turns hourly monitor readings into one color-coded number between 0 and 500. Each monitor reports the highest value among ozone, PM2.5, and PM10 that hour. Green and yellow mean outdoor activity is fine for most people. Orange, red, and purple mean cut exertion and filter the air indoors. TL;DR The U.S. … Read more