Chennai AQI Today
Live AQI, a full pollutant breakdown and a 4-day forecast for Chennai, updated every 15 minutes.
The Air Quality Index in Chennai, Tamil Nadu is 27 (Good) on India's CPCB National AQI scale, driven by Ozone with PM2.5 at 15 µg/m³. Updated every 15 minutes from OpenWeatherMap station data, last read .
Updated 09:10 pm
Air quality is clean. Minimal impact on health.
Ozone is driving this reading — mostly sunlight reacting with traffic and industrial fumes.
Pollutants
PM2.5
15
μg/m³
sub-index 25
PM10
23
μg/m³
sub-index 23
Ozone
27
μg/m³
sub-index 27
NO₂
10
μg/m³
sub-index 13
SO₂
3.7
μg/m³
sub-index 5
CO
336
μg/m³
sub-index 17
The AQI is the highest of these sub-indices, on the CPCB National AQI (India) scale. Both standards are defined over 8- and 24-hour averages; readings here are instantaneous, so treat short spikes with care.
What you should do
Great day for a morning walk or run
Open windows for fresh air
No mask needed outdoors
Let children play outside freely