What is the air quality trend in Gary?

Over the past 8 days, Gary had an average AQI of 37 based on station measurements. The worst day was 2026-10-21 with AQI 64.

How is Gary air quality measured?

Air quality in Gary 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 Gary, United States

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

Historical PM2.5 and AQI trend from monitoring stations near Gary, United States.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 279 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-22	61	27–70	17.4 µg/m³	12h	255
2026-10-21	64	51–80	18.1 µg/m³	24h	279
2026-10-20	52	29–71	13.7 µg/m³	24h	245
2026-10-19	28	22–41	6.7 µg/m³	24h	279
2026-10-18	23	17–35	5.5 µg/m³	24h	257
2026-10-17	16	13–23	3.9 µg/m³	24h	279
2026-10-16	19	10–40	4.4 µg/m³	24h	266
2026-10-15	33	29–41	7.9 µg/m³	9h	279

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