A good AQI level is between 0 and 50, indicating air quality that poses little or no risk to health.
AQI in Kolkata Today (Wednesday, July 30) - Air Quality in Kolkata
As of Today, Kolkata AQI level is 49 which is recorded as Good category. This level is 1 point(s) higher compared to the previous day. The AQI, a standard measure of air quality, offers insights into the concentration of pollutants in the air, ranging from harmful particles to gases like carbon monoxide and sulfur dioxide.
Kolkata's AQI
Kolkata WeatherWednesday Jul 30
Last 7 Days AQI
Dates | City, States | AQI |
---|---|---|
July 29, 2025 | Kolkata, West Bengal | 49 |
July 28, 2025 | Kolkata, West Bengal | 48 |
July 27, 2025 | Kolkata, West Bengal | 43 |
July 26, 2025 | Kolkata, West Bengal | 42 |
July 25, 2025 | Kolkata, West Bengal | 49 |
July 24, 2025 | Kolkata, West Bengal | 43 |
July 23, 2025 | Kolkata, West Bengal | 46 |
Changes in AQI in Last 7 Days
Most Polluted City/States in India
Rank | City, States | AQI |
---|---|---|
1 | Agartala, Tripura | 254 |
2 | Gorakhpur, Uttar Pradesh | 227 |
3 | Sri Ganganagar, Rajasthan | 191 |
4 | Byrnihat, Assam | 149 |
5 | Churu, Rajasthan | 121 |
6 | Chhapra, Bihar | 114 |
7 | Baran, Rajasthan | 114 |
8 | Baddi, Himachal Pradesh | 113 |
9 | Jaisalmer, Rajasthan | 99 |
10 | Visakhapatnam, Andhra Pradesh | 96 |
Least Polluted City/States in India
Rank | City, States | AQI |
---|---|---|
1 | Aizawl, Mizoram | 10 |
2 | Madikeri, Karnataka | 17 |
3 | Kishanganj, Bihar | 19 |
4 | Sivasagar, Assam | 20 |
5 | Dehradun, Uttarakhand | 22 |
6 | Chikkaballapur, Karnataka | 22 |
7 | Katihar, Bihar | 22 |
8 | Shillong, Meghalaya | 23 |
9 | Chittorgarh, Rajasthan | 24 |
10 | Naharlagun, Arunachal Pradesh | 24 |
AQI In Indian Cities
Frequently Asked Questions
Which AQI is best?
What are the criteria for AQI?
AQI criteria include measuring the concentration of pollutants like PM2.5, PM10, ozone, nitrogen dioxide, sulphur dioxide, carbon monoxide, and ammonia over a specified averaging period.
What are the 8 parameters of AQI?
The 8 parameters of AQI are: Particulate Matter (PM10), Particulate Matter (PM2.5), Ozone (O3), Nitrogen Dioxide (NO2), Sulphur Dioxide (SO2), Carbon Monoxide (CO), Ammonia (NH3), and Lead (Pb).
What are the 6 categories of AQI?
The 6 categories of AQI are: 0-50: Good, 51-100: Moderate, 101-200: Poor, 201-300: Unhealthy, 301-400: Severe, 401-500+: Hazardous