What is the air quality trend in Kolkata?

Over the past 18 days, Kolkata had an average AQI of 102 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

342h · 21 stations

Daily Summary

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-04-10	103	96–111	36.4 µg/m³	22h	130
2026-04-09	88	66–104	29.6 µg/m³	23h	95
2026-04-08	81	62–87	26.3 µg/m³	12h	89
2026-04-07	88	83–91	29.7 µg/m³	24h	127
2026-04-06	94	76–101	32.7 µg/m³	20h	108
2026-04-05	98	71–151	33.5 µg/m³	4h	1
2026-04-04	106	101–111	37.6 µg/m³	15h	125
2026-04-03	96	93–100	33.5 µg/m³	24h	130
2026-04-02	103	75–135	36.1 µg/m³	24h	112
2026-04-01	122	102–151	44.1 µg/m³	24h	121
2026-03-31	109	97–123	38.8 µg/m³	24h	121
2026-03-30	101	56–123	35.4 µg/m³	15h	80
2026-03-29	98	79–107	34.3 µg/m³	24h	124
2026-03-28	92	82–106	31.7 µg/m³	24h	125
2026-03-27	119	107–128	43.0 µg/m³	24h	127
2026-03-26	115	101–127	41.2 µg/m³	24h	126
2026-03-25	98	71–139	34.2 µg/m³	14h	54
2026-03-24	134	134–134	48.7 µg/m³	1h	1

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