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Kolkata AQI Today

100US AQI
Moderate

The current Air Quality Index in Kolkata, West Bengal, India is 100, which is considered moderate. The fine particulate (PM2.5) concentration is 18 µg/m³.

Last updated · Source: CAMS forecast model

Pollutant levels in Kolkata

PM2.518 µg/m³Fine particulate matter
PM1020 µg/m³Coarse particulate matter
O₃104 µg/m³Ozone
NO₂4.5 µg/m³Nitrogen dioxide
SO₂9.4 µg/m³Sulphur dioxide
CO390 µg/m³Carbon monoxide

Health advice

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged or heavy outdoor exertion.

7-day AQI trend

DayAQICategory
Aug 1654Moderate
Aug 1757Moderate
Aug 1866Moderate
Aug 1966Moderate
Aug 2071Moderate
Aug 2193Moderate
Aug 2299Moderate

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, read the AQI scale reference, or compare PM2.5 and PM10.

Frequently asked questions about Kolkata air quality

What is the AQI in Kolkata today?

The current Air Quality Index in Kolkata, West Bengal, India is 100 on the 0–500 US AQI scale, which is categorised as moderate. The reading comes from a CAMS forecast model and refreshes throughout the day.

What is the PM2.5 level in Kolkata right now?

Fine particulate matter (PM2.5) in Kolkata, West Bengal, India is currently 18 µg/m³. The World Health Organization recommends keeping the 24-hour average below 15 µg/m³, so Kolkata is currently above the WHO guideline.

Is it safe to go outside in Kolkata today?

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged or heavy outdoor exertion.

What is considered a good AQI level?

An AQI of 0–50 is good, 51–100 is moderate, 101–150 is unhealthy for sensitive groups, 151–200 is unhealthy, 201–300 is very unhealthy, and anything above 300 is hazardous. The scale is the same everywhere, so readings are directly comparable between cities.

How often is the Kolkata air quality data updated?

Air quality readings for Kolkata, West Bengal, India refresh throughout the day, and this page is rendered fresh on every visit, so the AQI, pollutant breakdown and 7-day trend always reflect the latest available model output.

Air quality near Kolkata

Compare Kolkata with the closest monitored cities — pollution is regional, so neighbouring readings often move together.

Open the live AQI dashboard Compare cities← All cities