Illinois
64 monitoring stations · readings from 42 to 76
Average AQI
Air quality in Illinois
Air quality in Illinois is currently 56 on the AQI scale, which falls in the Moderate band. That number is the average across every monitoring station reporting in Illinois right now.
We aggregate 64 stations across Illinois. Individual stations range from 42 at the cleanest to 76 at the worst, so conditions vary across Illinois — the local figure matters more than the average.
Illinois breaks down into 43 cities you can open individually. Of those listed below, Peoria is reading highest at 76 and Decatur lowest at 42.
Readings refresh hourly from the official monitoring networks we track. Conditions can change quickly, so check back before planning time outdoors.
What to do at moderate levels
Outdoor activity
Fine for most people. If you are planning a long or intense session outdoors, the early morning is usually cleaner.
Sensitive groups
Unusually sensitive people may notice mild irritation. Keep reliever medication to hand if you use it.
Indoor air
Ventilating is still worthwhile. Consider closing up during traffic peaks if you live on a busy road.
Cities in Illinois
43 cities
Peoria
Moderate
- Stations
- 1
- Range
- 76–76
East Peoria
Moderate
- Stations
- 1
- Range
- 74–74
73Rock Island
Moderate
- Stations
- 2
- Range
- 72–74
Moline
Moderate
- Stations
- 1
- Range
- 71–71
70Alsip
Moderate
- Stations
- 2
- Range
- 69–71
Evergreen Park
Moderate
- Stations
- 1
- Range
- 67–67
Mccook
Moderate
- Stations
- 1
- Range
- 67–67
Aurora
Moderate
- Stations
- 1
- Range
- 63–63
63Jerseyville
Moderate
- Stations
- 2
- Range
- 63–63
63Lansing
Moderate
- Stations
- 2
- Range
- 63–63
61Granite City
Moderate
- Stations
- 3
- Range
- 60–63
Alton
Moderate
- Stations
- 1
- Range
- 60–60
60Chicago
Moderate
- Stations
- 5
- Range
- 50–69
60Naperville
Moderate
- Stations
- 2
- Range
- 60–60
58East St Louis
Moderate
- Stations
- 2
- Range
- 58–58
Maryville
Moderate
- Stations
- 1
- Range
- 58–58
Stockton
Moderate
- Stations
- 1
- Range
- 58–58
56Joliet
Moderate
- Stations
- 2
- Range
- 56–56
Wood River
Moderate
- Stations
- 1
- Range
- 56–56
Baldwin
Moderate
- Stations
- 1
- Range
- 54–54
Chester
Moderate
- Stations
- 1
- Range
- 54–54
Glencoe
Moderate
- Stations
- 1
- Range
- 54–54
Mcleansboro
Moderate
- Stations
- 1
- Range
- 54–54
Northbrook
Moderate
- Stations
- 1
- Range
- 54–54
Schiller Park
Moderate
- Stations
- 1
- Range
- 54–54
Benton
Moderate
- Stations
- 1
- Range
- 52–52
52Cary
Moderate
- Stations
- 2
- Range
- 52–52
Des Plaines
Moderate
- Stations
- 1
- Range
- 52–52
Elgin
Moderate
- Stations
- 1
- Range
- 52–52
Glenview
Moderate
- Stations
- 1
- Range
- 52–52
Oak Park
Moderate
- Stations
- 1
- Range
- 52–52
Robinson
Moderate
- Stations
- 1
- Range
- 52–52
West Union
Moderate
- Stations
- 1
- Range
- 52–52
Winthrop Harbor
Moderate
- Stations
- 1
- Range
- 52–52
51Cicero
Moderate
- Stations
- 2
- Range
- 50–52
Braidwood
Good
- Stations
- 1
- Range
- 50–50
Wilmington
Good
- Stations
- 1
- Range
- 50–50
46Normal
Good
- Stations
- 2
- Range
- 46–46
46Rockford
Good
- Stations
- 2
- Range
- 46–46
43Champaign
Good
- Stations
- 3
- Range
- 42–46
About Illinois
Coordinates
40.741, -88.719
Centroid of monitored stations
Stations
64
Reporting in this area
Spread
42 – 76
Cleanest to worst station reading
Other regions nearby
Illinois air quality, answered
Illinois is currently reading an AQI of 56, which is Moderate. It is the average across 64 reporting stations.
Fine for most people. If you are planning a long or intense session outdoors, the early morning is usually cleaner. Unusually sensitive people may notice mild irritation. Keep reliever medication to hand if you use it.
56 sits in the Moderate band of the air quality index. The index runs from 0 to 500, and the lower the number the cleaner the air.
We currently aggregate 64 stations in Illinois, reading between 42 and 76.
Of the cities currently listed for Illinois, Peoria is reading highest at 76 (Moderate).
Hourly. We pull from the official monitoring networks that publish for this region, and this page refreshes on the same cadence.
See Illinois on the map.
Every station around it, live — or find out what today's reading means for you personally.