AQI Comparison
AQI 25 vs AQI 150
A one-step change in AQI category can translate into a meaningful jump in particle dose.
AQI 25
0.27
cigarettes per 24h
Good: Most people can keep their normal routine.
AQI 150
3.11
cigarettes 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
62.5
µg/m³
Difference per day
2.84
cigarettes
Direction
AQI 150 is materially heavier exposure
Moving from AQI 25 to AQI 150 changes both dose and the protection plan.
Calculate AQI 25
Open the interactive calculator with AQI 25 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.