What is the air quality trend in Hoffman Estates?

Over the past 3 days, Hoffman Estates had an average AQI of 44 based on station measurements. The worst day was 2026-10-21 with AQI 54.

How is Hoffman Estates air quality measured?

Air quality in Hoffman Estates 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 Hoffman Estates, United States

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

45h

PM2.5 Station

45h · 280 stations

Temperature GFS model

8pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-21	54	52–56	13.6 µg/m³	5.5	3h	280
2026-10-20	51	25–71	13.3 µg/m³	1.1	24h	246
2026-10-19	29	22–41	7.0 µg/m³	3.4	18h	280

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