The 24 hour AQI is a prediction of what the 24 hour AQI average will be for the current day.
The prediction is based on a weighted average of the last 12 hours of data, with the most recent hours being weighted more heavily.
|Air Quality Index
|Levels of Health Concern||Colors|
|When the AQI is in this range:||..air quality conditions are:||...as symbolized by this color:|
|101-150||Unhealthy for Sensitive Groups||Orange|
|151 to 200||Unhealthy||Red|
|201 to 300||Very Unhealthy||Purple|
|301 to 500||Hazardous||Maroon|