What is the air quality trend in Chennai?

Over the past 15 days, Chennai had an average AQI of 89 based on station measurements. The worst day was 2026-05-26 with AQI 104.

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

329h

PM2.5 Station

329h · 7 stations

Temperature GFS model

56pt

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	95	25–192	35.0 µg/m³	24h	8
2026-05-21	103	55–176	41.4 µg/m³	24h	7
2026-05-20	81	20–177	28.3 µg/m³	24h	8
2026-05-19	95	24–166	34.5 µg/m³	24h	7
2026-05-18	87	26–166	30.6 µg/m³	24h	8
2026-05-17	62	17–141	18.5 µg/m³	23h	6
2026-05-16	98	32–205	41.6 µg/m³	21h	7
2026-05-15	91	56–188	36.5 µg/m³	9h	9

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