What is the air quality trend in Kolkata?

Over the past 8 days, Kolkata had an average AQI of 87 based on station measurements. The worst day was 2026-08-03 with AQI 98.

How is Kolkata air quality measured?

Air quality in Kolkata is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Kolkata, India

Name: Kolkata Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Kolkata, India.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

143h

PM2.5 Station

143h · 89 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	73	72–73	22.5 µg/m³	3h	88
2026-08-07	78	73–86	24.8 µg/m³	24h	93
2026-08-06	94	87–101	32.5 µg/m³	22h	84
2026-08-05	90	86–111	30.6 µg/m³	21h	82
2026-08-04	97	89–103	33.8 µg/m³	24h	98
2026-08-03	98	73–103	34.2 µg/m³	23h	81
2026-08-02	89	65–125	29.7 µg/m³	15h	7
2026-08-01	81	71–94	26.2 µg/m³	11h	56

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