What is the air quality trend in Crest Hill?

Over the past 8 days, Crest Hill had an average AQI of 99 based on station measurements. The worst day was 2026-07-17 with AQI 234.

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

167h

PM2.5 Station

167h · 4 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	30	28–32	7.2 µg/m³	2h	136
2026-07-21	62	32–97	18.3 µg/m³	24h	258
2026-07-20	100	67–107	34.8 µg/m³	24h	248
2026-07-19	111	54–160	40.8 µg/m³	24h	258
2026-07-18	49	26–89	12.8 µg/m³	24h	259
2026-07-17	234	69–360	180.4 µg/m³	24h	271
2026-07-16	152	51–330	100.3 µg/m³	24h	251
2026-07-15	54	51–94	13.6 µg/m³	21h	261

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