Chennai Air Quality Index
Chennai, India · Real-time AQI data
Air quality is satisfactory, and air pollution poses little or no risk.
Pollutant Breakdown
PM2.5
24µg/m³
PM10
17µg/m³
O₃
6.7ppm
NO₂
4.5ppb
SO₂
2.6ppb
CO
4.9ppm
Station: Royapuram, Chennai, Chennai, India · Mar 18, 04:00 AM · Updates every 30 min
Health Recommendations
Air quality is satisfactory, and air pollution poses little or no risk.
How does Chennai compare to other cities?
Compare →AQI Scale Reference
Other Cities in India
About Air Quality in Chennai
The Air Quality Index (AQI) in Chennai is measured using monitoring stations that track six key pollutants: PM2.5, PM10, ground-level ozone, nitrogen dioxide, sulfur dioxide, and carbon monoxide. The AQI is calculated using US EPA standards and ranges from 0 (excellent) to 500 (hazardous).
PM2.5 is typically the dominant pollutant in Chennai during high-pollution periods. Fine particulate matter from traffic, industry, and seasonal factors can push AQI above 150, which is considered unhealthy for all groups.
Check the health effects guide to understand what today's AQI means for your activity level, or see the global AQI rankings to compare Chennai with other cities worldwide.