AQI Comparison
AQI 75 vs AQI 150
A one-step AQI category change can mean a meaningful increase in estimated PM2.5 concentration-time.
AQI 75
1
cigarette-equivalents per 24h
Moderate: Most adults are okay, but long hard efforts may start to matter.
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
33.4
µg/m³
Difference per day
1.52
cigarettes
Direction
AQI 150 is materially heavier exposure
Moving from AQI 75 to AQI 150 changes both estimated PM2.5 concentration and the protection plan.
Calculate AQI 75
Open the interactive calculator with AQI 75 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.