What is the air quality trend in Chas?

Over the past 8 days, Chas had an average AQI of 108 based on station measurements. The worst day was 2026-07-20 with AQI 128.

How is Chas air quality measured?

Air quality in Chas 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 Chas, India

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

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

105

Current AQI
Unhealthy for sensitive groups CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 3 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	98	84–123	33.8 µg/m³	22h	3
2026-07-20	128	120–134	46.4 µg/m³	24h	2
2026-07-19	109	95–120	38.9 µg/m³	23h	3
2026-07-18	110	103–114	38.9 µg/m³	24h	3
2026-07-17	96	87–107	33.4 µg/m³	24h	4
2026-07-16	102	93–112	36.0 µg/m³	24h	3
2026-07-15	113	107–116	40.4 µg/m³	24h	3
2026-07-14	108	108–108	38.2 µg/m³	1h	4

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