What is the air quality trend in Lemont?

Over the past 8 days, Lemont had an average AQI of 97 based on station measurements. The worst day was 2026-07-17 with AQI 233.

How is Lemont air quality measured?

Air quality in Lemont 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 Lemont, United States

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

Historical PM2.5 and AQI trend from monitoring stations near Lemont, 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 · 6 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	23	18–32	5.5 µg/m³	5h	219
2026-07-21	63	32–97	18.3 µg/m³	24h	263
2026-07-20	98	63–106	34.3 µg/m³	24h	254
2026-07-19	111	67–160	40.8 µg/m³	24h	264
2026-07-18	50	26–89	12.9 µg/m³	24h	265
2026-07-17	233	68–360	179.7 µg/m³	24h	276
2026-07-16	153	52–328	100.6 µg/m³	24h	257
2026-07-15	52	51–53	12.6 µg/m³	18h	265

Back to Lemont Air Quality