
AQI Family Quick Card
The Air Quality Index is EPA's color-coded tool for communicating outdoor air quality and possible health concern. Higher numbers mean greater concern. The AQI covers five major pollutants, and the pollutant producing the highest value usually drives the number you see. During wildfire smoke, PM2.5 is often the main concern. Use current AQI for decisions now, forecasts for planning, and official local alerts for emergency instructions.
