What is the air quality trend in Grayslake?

Over the past 15 days, Grayslake had an average AQI of 25 based on station measurements. The worst day was 2026-10-11 with AQI 44.

How is Grayslake air quality measured?

Air quality in Grayslake 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 Grayslake, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

253h

PM2.5 Station

253h · 1 station

Temperature GFS model

55pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	16	2–29	3.8 µg/m³	4h	1
2026-10-20	30	20–42	7.1 µg/m³	16h	1
2026-10-19	24	14–43	5.9 µg/m³	14h	1
2026-10-18	23	15–34	5.6 µg/m³	19h	1
2026-10-17	22	14–30	5.2 µg/m³	16h	1
2026-10-16	16	7–22	3.7 µg/m³	18h	1
2026-10-15	20	17–25	4.7 µg/m³	19h	1
2026-10-14	10	1–33	2.5 µg/m³	18h	1
2026-10-13	29	3–59	7.1 µg/m³	19h	1
2026-10-12	17	4–44	4.1 µg/m³	24h	1
2026-10-11	44	5–126	13.3 µg/m³	21h	1
2026-10-10	43	26–153	12.3 µg/m³	16h	1
2026-10-09	26	16–34	6.3 µg/m³	18h	1
2026-10-08	29	19–37	6.9 µg/m³	14h	1
2026-10-07	33	25–42	7.9 µg/m³	17h	1

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