What is the air quality trend in Gary?

Over the past 8 days, Gary had an average AQI of 34 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

166h

PM2.5 Station

166h · 274 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-22	49	34–57	12.4 µg/m³	1.5	3h	184
2026-10-21	64	51–80	18.2 µg/m³	3.9	24h	277
2026-10-20	53	25–71	13.9 µg/m³	1.1	24h	243
2026-10-19	28	22–41	6.7 µg/m³	3.4	24h	277
2026-10-18	22	10–35	5.3 µg/m³	—	24h	254
2026-10-17	16	13–23	3.9 µg/m³	4.5	24h	276
2026-10-16	19	10–40	4.6 µg/m³	1.1	24h	265
2026-10-15	26	15–41	6.3 µg/m³	1.6	19h	276

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