What is the air quality trend in North Chicago?

Over the past 15 days, North Chicago had an average AQI of 45 based on station measurements. The worst day was 2026-07-16 with AQI 84.

How is North Chicago air quality measured?

Air quality in North 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 North Chicago, United States

Name: North 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 North Chicago, United States.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

228h

PM2.5 Station

228h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	25	18–34	6.1 µg/m³	3h	1
2026-07-21	14	1–38	3.3 µg/m³	18h	1
2026-07-20	31	16–44	7.5 µg/m³	24h	1
2026-07-19	52	19–82	14.2 µg/m³	24h	1
2026-07-18	30	4–56	7.2 µg/m³	9h	1
2026-07-17	80	11–121	26.6 µg/m³	24h	1
2026-07-16	84	5–129	28.1 µg/m³	21h	1
2026-07-15	45	37–79	11.5 µg/m³	8h	1
2026-07-14	52	49–62	12.9 µg/m³	11h	1
2026-07-13	55	45–77	14.3 µg/m³	19h	1
2026-07-12	45	36–52	10.9 µg/m³	15h	1
2026-07-11	40	31–54	9.7 µg/m³	17h	1
2026-07-10	32	20–52	7.8 µg/m³	18h	1
2026-07-09	42	38–47	10.1 µg/m³	7h	1
2026-07-08	52	44–85	13.4 µg/m³	10h	1

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