What is the air quality trend in Delhi?

Over the past 8 days, Delhi had an average AQI of 163 based on station measurements. The worst day was 2026-10-21 with AQI 235.

How is Delhi air quality measured?

Air quality in Delhi 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 Delhi, India

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

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

227

Current AQI
Very unhealthy Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

107h

PM2.5 Station

107h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	235	211–256	185.1 µg/m³	3h	2
2026-10-20	209	153–336	141.0 µg/m³	14h	3
2026-10-19	142	73–169	61.1 µg/m³	19h	2
2026-10-18	150	69–262	75.7 µg/m³	15h	2
2026-10-17	171	151–193	93.7 µg/m³	19h	2
2026-10-16	122	43–183	54.4 µg/m³	15h	2
2026-10-15	122	54–175	49.2 µg/m³	15h	3
2026-10-14	158	113–187	77.5 µg/m³	7h	3

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