The Air Quality Index (AQI) is a combined score based on several pollutants such as PM2.5, PM10, ozone, carbon monoxide, nitrogen dioxide, and sulphur dioxide. It reflects outdoor city-level air but not the exact mix of pollutants in your home.
Your Qubo Air Purifier shows real-time PM2.5 readings — fine dust particles most harmful to health. Indoor PM2.5 levels drop faster when doors and windows are closed, so your purifier’s readings are often lower than outdoor AQI.
Qubo focuses on PM2.5 because it’s the most accurate and health-relevant indicator of indoor air quality.
This table shows how PM₂.₅ concentration levels correspond to Air Quality Index (AQI) values based on the official CPCB (India) standard. Higher PM₂.₅ levels indicate poorer air quality and greater potential health risks.
| Air Quality Category |
AQI Range |
PM₂.₅ (µg/m³) |
| Good |
0 – 50 |
0 – 30 |
| Satisfactory |
51 – 100 |
31 – 60 |
| Moderate |
101 – 200 |
61 – 90 |
| Poor |
201 – 300 |
91 – 120 |
| Very Poor |
301 – 400 |
121 – 250 |
| Severe |
401 – 500 |
251 – 500 |