What is the air quality trend in Gary?

Over the past 14 days, Gary had an average AQI of 80 based on station measurements. The worst day was 2026-07-17 with AQI 234.

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

335h

PM2.5 Station

335h · 3 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	63	32–98	18.8 µg/m³	23h	250
2026-07-20	99	59–107	34.7 µg/m³	24h	252
2026-07-19	111	54–160	40.6 µg/m³	24h	263
2026-07-18	50	33–88	12.9 µg/m³	24h	263
2026-07-17	234	69–361	180.1 µg/m³	24h	277
2026-07-16	159	51–329	104.1 µg/m³	24h	256
2026-07-15	58	51–168	16.4 µg/m³	24h	268
2026-07-14	60	38–67	16.7 µg/m³	24h	262
2026-07-13	62	37–67	17.2 µg/m³	24h	267
2026-07-12	50	26–57	12.4 µg/m³	24h	255
2026-07-11	38	23–51	9.1 µg/m³	24h	211
2026-07-10	35	26–48	8.5 µg/m³	24h	257
2026-07-09	51	31–54	12.4 µg/m³	24h	269
2026-07-08	55	46–62	14.2 µg/m³	24h	280

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