AQI World

Kolkata Air Quality Index

Kolkata, India · Real-time AQI data

Moderate

Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

Pollutant Breakdown

PM2.5

60µg/m³

PM10

23µg/m³

O₃

3.6ppm

NO₂

6.1ppb

SO₂

3.2ppb

CO

1.7ppm

Station: Ballygunge, Kolkata, India · Mar 18, 04:00 AM · Updates every 30 min

Health Recommendations

Moderate

Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

General Public: Air quality is acceptable for most people.
Children: Unusually sensitive children should limit prolonged outdoor play.
Heart Conditions: Unusually sensitive people should consider reducing exertion.

How does Kolkata compare to other cities?

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AQI Scale Reference

0–50
Good
51–100
Moderate
101–150
Unhealthy for Sensitive Groups
151–200
Unhealthy
201–300
Very Unhealthy
301–500
Hazardous

Other Cities in India

165Delhi113Mumbai139Bangalore24Chennai64Hyderabad

About Air Quality in Kolkata

The Air Quality Index (AQI) in Kolkata is measured using monitoring stations that track six key pollutants: PM2.5, PM10, ground-level ozone, nitrogen dioxide, sulfur dioxide, and carbon monoxide. The AQI is calculated using US EPA standards and ranges from 0 (excellent) to 500 (hazardous).

PM2.5 is typically the dominant pollutant in Kolkata during high-pollution periods. Fine particulate matter from traffic, industry, and seasonal factors can push AQI above 150, which is considered unhealthy for all groups.

Check the health effects guide to understand what today's AQI means for your activity level, or see the global AQI rankings to compare Kolkata with other cities worldwide.