AQI Comparison
AQI 0 vs AQI 150
A one-step AQI category change can mean a meaningful increase in estimated PM2.5 concentration-time.
AQI 0
0
cigarette-equivalents per 24h
Good: Most people can keep their normal routine.
AQI 150
2.52
cigarette-equivalents per 24h
Unhealthy for Sensitive Groups: This is the point where many households should start changing plans.
What changes between these two AQI values
Difference in PM2.5
55.4
µg/m³
Difference per day
2.52
cigarettes
Direction
AQI 150 is materially heavier exposure
Moving from AQI 0 to AQI 150 changes both estimated PM2.5 concentration and the protection plan.
Calculate AQI 0
Open the interactive calculator with AQI 0 loaded.
Calculate AQI 150
Use the interactive calculator to test a different duration.
See how the numbers are derived
Review the AQI-to-PM2.5 and PM2.5-to-cigarettes methodology.