What is the air quality trend in West Chicago?

Over the past 3 days, West Chicago had an average AQI of 43 based on station measurements. The worst day was 2026-10-21 with AQI 52.

How is West Chicago air quality measured?

Air quality in West Chicago 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 West Chicago, United States

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

Historical PM2.5 and AQI trend from monitoring stations near West Chicago, 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 · 247 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	52	52–52	12.8 µg/m³	11.6	1h	247
2026-10-20	51	22–71	13.4 µg/m³	1.1	24h	215
2026-10-19	28	21–40	6.8 µg/m³	3.4	20h	245

Back to West Chicago Air Quality