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Air Quality (AQI) in Tamil Nadu

Air Quality (AQI) across every tracked city in Tamil Nadu.

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Air Quality (AQI) – Tamil Nadu

Live

Thoothukudi 382 Very Poor
Coimbatore 359 Very Poor
Cuddalore 32 Good
Gummidipoondi 123 Moderate
Chennai 469 Severe

0–50 Good 51–100 Satisfactory 101–200 Moderate 201–300 Poor 301–400 Very Poor 400+ Severe

⚠️ Severe: Avoid all outdoor activity. This level affects even healthy people.

🕒 Updated 18 Oct, 10:20 AM IST All Tamil Nadu AQI →

What do these numbers mean?

The Air Quality Index (AQI) is a single 0–500 score used by India's Central Pollution Control Board (CPCB) to describe how polluted the air is right now, combining PM2.5, PM10, NO₂, SO₂, CO and O₃ into one number. India's official bands run 0–50 Good, 51–100 Satisfactory, 101–200 Moderate, 201–300 Poor, 301–400 Very Poor, and 400+ Severe. Anything above 200 is generally considered unsafe for prolonged outdoor activity, especially for children, older adults, and anyone with respiratory or heart conditions.