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 118 (Moderate) on India's CPCB National AQI scale, driven by Ozone with PM2.5 at 53 µg/m³. Updated every 15 minutes from OpenWeatherMap station data, last read .
Updated 05:35 am
Breathing discomfort likely for people with asthma, heart disease, children and the elderly.
Ozone is driving this reading — mostly sunlight reacting with traffic and industrial fumes.
Pollutants
PM2.5
53
μg/m³
sub-index 89
PM10
58
μg/m³
sub-index 59
Ozone
112
μg/m³
sub-index 118
NO₂
3.8
μg/m³
sub-index 5
SO₂
8.1
μg/m³
sub-index 10
CO
328
μg/m³
sub-index 16
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
Sensitive groups should cut back prolonged outdoor exertion
Run an air purifier indoors
Keep windows closed during peak traffic hours
Wear a mask outdoors if you have asthma or a heart condition