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Chennai AQI Today

70US AQI
Moderate

The current Air Quality Index in Chennai, Tamil Nadu, India is 70, which is considered moderate. The fine particulate (PM2.5) concentration is 17.3 µg/m³.

Last updated · Source: CAMS forecast model

Pollutant levels in Chennai

PM2.517.3 µg/m³Fine particulate matter
PM1025 µg/m³Coarse particulate matter
O₃121 µg/m³Ozone
NO₂8.5 µg/m³Nitrogen dioxide
SO₂8 µg/m³Sulphur dioxide
CO185 µg/m³Carbon monoxide

Health advice

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged or heavy outdoor exertion.

7-day AQI trend

DayAQICategory
Aug 1668Moderate
Aug 1774Moderate
Aug 1881Moderate
Aug 1981Moderate
Aug 2075Moderate
Aug 2167Moderate
Aug 2269Moderate

About the Air Quality Index

The Air Quality Index (AQI) converts measured pollutant concentrations — including PM2.5, PM10, ozone (O₃), nitrogen dioxide (NO₂), sulphur dioxide (SO₂), and carbon monoxide (CO) — into a single 0–500 scale. Higher values mean greater health risk. The reading for Chennai reflects a CAMS forecast model and updates throughout the day. Learn what the AQI number means for your body, read the AQI scale reference, or compare PM2.5 and PM10.

Frequently asked questions about Chennai air quality

What is the AQI in Chennai today?

The current Air Quality Index in Chennai, Tamil Nadu, India is 70 on the 0–500 US AQI scale, which is categorised as moderate. The reading comes from a CAMS forecast model and refreshes throughout the day.

What is the PM2.5 level in Chennai right now?

Fine particulate matter (PM2.5) in Chennai, Tamil Nadu, India is currently 17.3 µg/m³. The World Health Organization recommends keeping the 24-hour average below 15 µg/m³, so Chennai is currently above the WHO guideline.

Is it safe to go outside in Chennai today?

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged or heavy outdoor exertion.

What is considered a good AQI level?

An AQI of 0–50 is good, 51–100 is moderate, 101–150 is unhealthy for sensitive groups, 151–200 is unhealthy, 201–300 is very unhealthy, and anything above 300 is hazardous. The scale is the same everywhere, so readings are directly comparable between cities.

How often is the Chennai air quality data updated?

Air quality readings for Chennai, Tamil Nadu, India refresh throughout the day, and this page is rendered fresh on every visit, so the AQI, pollutant breakdown and 7-day trend always reflect the latest available model output.

Air quality near Chennai

Compare Chennai with the closest monitored cities — pollution is regional, so neighbouring readings often move together.

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