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Kolkata AQI Today

172US AQI
Unhealthy

The current Air Quality Index in Kolkata, West Bengal, India is 172, which is considered unhealthy. The fine particulate (PM2.5) concentration is 111.8 µg/m³.

Last updated · Source: CAMS forecast model

Pollutant levels in Kolkata

PM2.5111.8 µg/m³Fine particulate matter
PM10124.8 µg/m³Coarse particulate matter
O₃46 µg/m³Ozone
NO₂31.9 µg/m³Nitrogen dioxide
SO₂29.6 µg/m³Sulphur dioxide
CO943 µg/m³Carbon monoxide

Health advice

Everyone may begin to experience health effects. Sensitive groups should avoid prolonged outdoor exertion; everyone else should limit it.

7-day AQI trend

DayAQICategory
Oct 1166Unhealthy
Oct 2169Unhealthy
Oct 3164Unhealthy
Oct 4167Unhealthy
Oct 5164Unhealthy
Oct 6169Unhealthy
Oct 7171Unhealthy

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, see what to do at today’s AQI, 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 172 on the 0–500 US AQI scale, which is categorised as unhealthy. 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 111.8 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?

Everyone may begin to experience health effects. Sensitive groups should avoid prolonged outdoor exertion; everyone else should limit it.

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.

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