What is the air quality trend in Chennai?

Over the past 8 days, Chennai had an average AQI of 93 based on station measurements. The worst day was 2026-05-22 with AQI 114.

How is Chennai air quality measured?

Air quality in Chennai 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 Chennai, India

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 7 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	75	30–114	24.1 µg/m³	14h	6
2026-05-28	69	25–155	21.8 µg/m³	22h	6
2026-05-27	91	19–176	32.5 µg/m³	24h	7
2026-05-26	104	39–240	41.4 µg/m³	24h	7
2026-05-25	98	34–183	38.4 µg/m³	24h	8
2026-05-24	102	66–152	35.4 µg/m³	24h	7
2026-05-23	97	20–163	34.8 µg/m³	24h	7
2026-05-22	114	71–192	47.3 µg/m³	9h	8

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