🌫️ Air Quality Index / AQI Calculator
Enter PM2.5, PM10, CO, O₃, NO₂, SO₂ pollutant concentrations to calculate Air Quality Index (AQI) and primary pollutant, with health recommendations.
📊 Enter Pollutant Concentrations
AQI Levels: 0-50 Good (Green) | 51-100 Moderate (Yellow) | 101-150 Unhealthy for Sensitive Groups (Orange) | 151-200 Unhealthy (Red) | 201-300 Very Unhealthy (Purple) | 301-500 Hazardous (Maroon)
IAQI Calculation: Individual Air Quality Index for each pollutant. The maximum value is the AQI. IAQI = (I_high - I_low) / (C_high - C_low) × (C - C_low) + I_low
Note: This tool follows the HJ 633-2012 Air Quality Index Technical Regulations. Only enter pollutant concentrations you have. Data is for reference only.