What is the air quality trend in Crest Hill?

Over the past 3 days, Crest Hill had an average AQI of 45 based on station measurements. The worst day was 2026-10-21 with AQI 55.

How is Crest Hill air quality measured?

Air quality in Crest Hill 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 Crest Hill, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

45h

PM2.5 Station

45h · 277 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	55	52–57	14.0 µg/m³	7.1	4h	277
2026-10-20	52	21–71	13.5 µg/m³	1.1	24h	243
2026-10-19	30	22–41	7.2 µg/m³	3.4	17h	276

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