Real-time Air Quality Index
Kolkata Air Quality Index (AQI)
69US AQI
Moderate
The current Air Quality Index in Kolkata, West Bengal, India is 69, which is considered moderate. The fine particulate (PM2.5) concentration is 23.3 µg/m³.
Last updated · Source: CAMS forecast model
Pollutant levels in Kolkata
PM2.523.3 µg/m³Fine particulate matter
PM1032.5 µg/m³Coarse particulate matter
O₃89 µg/m³Ozone
NO₂5 µg/m³Nitrogen dioxide
SO₂8.1 µg/m³Sulphur dioxide
CO226 µg/m³Carbon monoxide
Health advice
Air quality is acceptable. Unusually sensitive people should consider limiting prolonged or heavy outdoor exertion.
7-day AQI trend
| Day | AQI | Category |
|---|---|---|
| Jul 2 | 70 | Moderate |
| Jul 3 | 59 | Moderate |
| Jul 4 | 44 | Good |
| Jul 5 | 42 | Good |
| Jul 6 | 47 | Good |
| Jul 7 | 62 | Moderate |
| Jul 8 | 68 | Moderate |
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 Kolkata reflects a CAMS forecast model and updates throughout the day. Learn what the AQI number means for your body.