What is the air quality trend in Kolkata?

Over the past 8 days, Kolkata had an average AQI of 94 based on station measurements. The worst day was with AQI .

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.

104

Current AQI
Unhealthy for sensitive groups

48 Hours 7 Days 14 Days 20 Days

PM2.5 Trend

122h · 21 stations

Daily Summary

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-04-10	103	96–111	36.4 µg/m³	104.0	22h	130
2026-04-09	88	66–104	29.6 µg/m³	40.5	23h	95
2026-04-08	81	62–87	26.3 µg/m³	46.3	12h	89
2026-04-07	88	83–91	29.7 µg/m³	35.6	24h	127
2026-04-06	94	76–101	32.7 µg/m³	40.3	20h	108
2026-04-05	98	71–151	33.5 µg/m³	—	4h	1
2026-04-04	106	101–111	37.6 µg/m³	88.2	15h	125
2026-04-03	100	99–100	35.2 µg/m³	62.1	2h	130

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