Kolkata, West Bengal · Live air quality
You're looking at Kolkata's air right now — AQI 341, very poor, driven by PM2.5.
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Kolkata Air Quality Index (AQI) Today
Live air quality in Kolkata, West Bengal — real-time AQI, dominant pollutant, PM2.5 & PM10 levels and a plain-English health advisory, computed from CPCB data.
No — Kolkata's AQI is 341 (Very Poor). Avoid outdoor activity, keep windows closed, run a purifier and wear an N95 mask outdoors.
Where 341 sits on the India CPCB scale
Kolkata air quality forecast
25°C · wind 4 km/hLight winds (4 km/h) and calm air are letting pollution build up near the ground.
Hourly AQI forecast for the next 24 hours (CPCB scale).
Cleanest air today is forecast around 23:00 (AQI 292) — a good window for outdoor time.
Forecast modelled by Open-Meteo and converted to the CPCB scale. Forecasts are estimates and can change — our live readings above are measured.
What you can do outside right now
General guidance by AQI band. Sensitive groups should act one level earlier.
Live pollutant levels
Each pollutant's 24-hour concentration is converted to a CPCB sub-index; the city AQI is the highest of them (the dominant pollutant). Bars show the sub-index out of 500.
What this air does to your body
Illustrative equivalences from published research (Berkeley Earth; Air Quality Life Index, University of Chicago). Not a medical assessment of your personal risk.
Where the air is cleanest and worst in Kolkata right now
A live comparison of Kolkata's monitoring areas — the cleaner areas are the better choice for outdoor time right now, while the worst are best avoided for exercise. Each figure is a real station reading, not an estimate.
Cleaner areas — where to go
- 251Rabindra Sarobar, KolkataPoor
- 309Victoria, KolkataVery Poor
- 319Rabindra Bharati University, KolkataVery Poor
Worst areas — where to avoid
- 341Ballygunge, KolkataVery Poor
- 341Jadavpur, KolkataVery Poor
- 335Fort William, KolkataVery Poor
Monitoring stations in Kolkata
7 live CPCB stations, ranked worst air first. Each station's AQI is its own highest pollutant sub-index.
| Station | AQI | Category | PM2.5 | PM10 |
|---|---|---|---|---|
| Jadavpur, Kolkata - WBPCB | 341 | Very Poor | 173 | 144 |
| Ballygunge, Kolkata - WBPCB | 341 | Very Poor | 173 | 116 |
| Fort William, Kolkata - WBPCB | 335 | Very Poor | 165 | 138 |
| Bidhannagar, Kolkata - WBPCB | 322 | Very Poor | 147 | 123 |
| Rabindra Bharati University, Kolkata - WBPCB | 319 | Very Poor | 144 | 121 |
| Victoria, Kolkata - WBPCB | 309 | Very Poor | 131 | 122 |
| Rabindra Sarobar, Kolkata - WBPCB | 251 | Poor | 105 | 97 |
Source: CPCB continuous ambient air-quality monitoring stations via data.gov.in. Station-level values are the latest hourly averages.
24-hour AQI graph
min 341 · max 396Hourly AQI recorded each hour by DailyAQI (local time). Fills to a rolling 24 hours.
7-day AQI trend
Daily peak AQI recorded by DailyAQI since tracking began, coloured by category. History grows to a rolling 30 days.
Air quality calendar
Worst recorded day: 2026-11-07 (AQI 396) · cleanest: 2026-10-30 (AQI 77)
Each cell is a day, coloured by that day’s peak AQI band. Only days we have recorded are shown; the grid fills out over the month.
Make it personal
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Alert me when the air turns unhealthy
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What Very Poor air means for you
May cause respiratory illness on prolonged exposure; effects more pronounced for people with lung and heart disease.
Health guidance per CPCB National Air Quality Index bands. Informational only — not medical advice.
India's metro cities right now
AQI categories (India scale)
| AQI | Category | Associated health impact |
|---|---|---|
| 0–50 | Good | Air quality is considered satisfactory and air pollution poses little or no risk. |
| 51–100 | Satisfactory | Acceptable air quality; minor breathing discomfort possible for unusually sensitive people. |
| 101–200 | Moderate | May cause breathing discomfort to people with lung disease such as asthma, and to children and older adults. |
| 201–300 | Poor | May cause breathing discomfort to most people on prolonged exposure. |
| 301–400 | Very Poor | May cause respiratory illness on prolonged exposure; effects more pronounced for people with lung and heart disease. |
| 401–500 | Severe | Affects healthy people and seriously impacts those with existing diseases; avoid outdoor activity. |
Monitoring location
Approximate location of the monitoring station(s) feeding this reading. Map © OpenStreetMap.
Monitoring areas in Kolkata
Area-level air quality across Kolkata — open any locality for its local AQI, pollutants and health advice.
About air quality in Kolkata
This page tracks the Kolkata, West Bengal Air Quality Index using measurements from 7 Central Pollution Control Board (CPCB) monitoring stations, published through the Government of India's open-data portal. Right now Kolkata's AQI is 341 (Very Poor), with PM2.5 the dominant pollutant. The AQI is a single number from 0 to 500 that summarises how polluted the air is and what it means for health, built from pollutants such as fine particulate matter (PM2.5), coarse particulate matter (PM10), nitrogen dioxide, ground-level ozone and sulphur dioxide — the index reflects whichever is worst at the time.
How Kolkata's air changes through the year
As an eastern city, Kolkata sees pollution climb in winter — partly under the influence of the wider Indo-Gangetic plain and partly from regional industrial emissions — when calm, cool air holds pollutants near the surface. The monsoon clears the air, and the pre-winter and post-monsoon windows are usually more moderate.
What drives air pollution in Kolkata
Traffic, construction and road dust, industry and the burning of solid fuels are the main local sources, with regional factors and winter weather adding to the load when the air is calm.
Cleaner and worse areas within Kolkata
Air quality is not uniform across a city. Among Kolkata's monitoring areas right now, the air is cleanest around Rabindra Sarobar, Kolkata and worst around Ballygunge, Kolkata — a reminder that local traffic, industry and construction can make a real difference over just a few kilometres. The live area-by-area comparison above shows where to go and where to avoid at this moment.
Best time to visit Kolkata for cleaner air
For the cleanest air, the monsoon and the months just after it are usually best in Kolkata, while the driest, stillest weeks can be worse. Check the live reading on this page before outdoor exercise or sightseeing, and keep an N95 mask handy for high-pollution days.
Staying safe in Kolkata's air
When the AQI is in the Good or Satisfactory range, outdoor activity is fine for almost everyone. From Moderate upward, sensitive groups — children, older adults, pregnant people and anyone with asthma or heart disease — should pace themselves outdoors, and once the air turns Poor or worse it is sensible for everyone to limit strenuous outdoor exertion, keep windows closed, run an air purifier indoors and wear a well-fitting mask outside. This is general information rather than medical advice. We only display a number when a recent station reading exists — if you see "data updating", we are waiting on a fresh value rather than showing an estimate.
Air quality near Kolkata
All West Bengal cities →The nearest monitored cities to Kolkata, with their live AQI — tap any card for its full report.
Protect your health — air quality guides
Frequently asked questions
What is the AQI in Kolkata today?
The current Air Quality Index in Kolkata is 341 (Very Poor) on the Indian CPCB scale, with PM2.5 as the dominant pollutant.
Is it safe to go outside in Kolkata today?
No — Kolkata's AQI is 341 (Very Poor). Avoid outdoor activity, keep windows closed, run a purifier and wear an N95 mask outdoors.
What is the main pollutant in Kolkata?
Today the dominant pollutant driving Kolkata's AQI is PM2.5. The full pollutant breakdown (PM2.5, PM10, NO₂, O₃, CO, SO₂) is listed above.
How is Kolkata's AQI calculated?
Each pollutant's 24-hour concentration is converted to a sub-index using CPCB breakpoints; the city AQI is the highest sub-index. See our methodology.
What is the air quality forecast for Kolkata tomorrow?
Air in Kolkata is forecast to worsen tomorrow to around AQI 373 (Very Poor), up from about 338 today. Forecasts are modelled estimates (Open-Meteo) and can change.