AQI Calculator Utility
National Air Quality Index Calculator
Convert ambient air pollutant concentrations (PM2.5, PM10, CO, SO₂, NO₂, O₃) into official AQI index ratings under Indian CPCB and US EPA parameters.
Load Scenario:
µg/m³
—
µg/m³
—
µg/m³
—
µg/m³
—
mg/m³
—
µg/m³
—
µg/m³
—
µg/m³
—
How it is determined: Under both Indian & US guidelines, the overall AQI is the maximum of the individual pollutant sub-indices calculated. Indian rules require monitoring data for at least 3 pollutants, including at least one Particulate Matter (PM10 or PM2.5).
Calculate Overall AQI
Select a standard (CPCB / EPA) and input pollutant values in the left form panel to dynamically render the dashboard metrics.
🤖
AI AQI Advisor
Active Air Quality Bot
National Ambient Breakpoint Comparison
Air Quality Indices use specific regional ambient standards. The table below outlines how pollutant concentrations map to standard AQI levels under the Indian CPCB and US EPA guidelines.
🇮🇳 Indian CPCB Breakpoint Scale (24h averages)
| Category (AQI) | PM2.5 (µg/m³) | PM10 (µg/m³) | CO (mg/m³) |
|---|---|---|---|
| Good (0–50) | 0 – 30 | 0 – 50 | 0 – 1.0 |
| Satisfactory (51–100) | 31 – 60 | 51 – 100 | 1.1 – 2.0 |
| Moderate (101–200) | 61 – 90 | 101 – 250 | 2.1 – 10.0 |
| Poor (201–300) | 91 – 120 | 251 – 350 | 10.1 – 17.0 |
| Very Poor (301–400) | 121 – 250 | 351 – 430 | 17.1 – 34.0 |
| Severe (401–500+) | 250+ | 430+ | 34.0+ |
🇺🇸 US EPA Breakpoint Scale (2024 update)
| Category (AQI) | PM2.5 (µg/m³) | PM10 (µg/m³) | CO (ppm) |
|---|---|---|---|
| Good (0–50) | 0.0 – 9.0 | 0 – 54 | 0.0 – 4.4 |
| Moderate (51–100) | 9.1 – 35.4 | 55 – 154 | 4.5 – 9.4 |
| Sensitive Groups (101–150) | 35.5 – 55.4 | 155 – 254 | 9.5 – 12.4 |
| Unhealthy (151–200) | 55.5 – 125.4 | 255 – 354 | 12.5 – 15.4 |
| Very Unhealthy (201–300) | 125.5 – 225.4 | 355 – 424 | 15.5 – 30.4 |
| Hazardous (301–500) | 225.5+ | 425+ | 30.5+ |