What is the air quality trend in Elgin?

Over the past 8 days, Elgin had an average AQI of 31 based on station measurements. The worst day was 2026-10-20 with AQI 53.

How is Elgin air quality measured?

Air quality in Elgin 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 Elgin, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 140 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-20	53	16–72	14.1 µg/m³	—	19h	119
2026-10-19	28	22–41	6.7 µg/m³	—	24h	140
2026-10-18	23	18–38	5.6 µg/m³	—	24h	129
2026-10-17	17	13–24	3.9 µg/m³	—	24h	140
2026-10-16	18	10–35	4.4 µg/m³	—	24h	134
2026-10-15	24	14–40	5.8 µg/m³	—	24h	140
2026-10-14	39	19–54	9.3 µg/m³	1.5	24h	141
2026-10-13	48	48–49	11.7 µg/m³	3.3	3h	142

Back to Elgin Air Quality