Near West Side 4 Air Quality
Monitoring Station
· Chicago, United States
57
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Last Reading
Nearby Monitoring Stations
GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
Calibrated
44
7pm
44
44
44
10pm
44
43
44
1am
46
46
46
4am
44
46
73
7am
85
—
—
10am
—
—
—
1pm
—
—
—
4pm
—
—
CAMS model
adj +19
25
25
25
25
25
24
25
27
27
27
25
27
54
66
Air Quality Forecast (24h)
PM2.515.1 µg/m³
✓ WHO
Moderate
Nearby Monitoring Stations
53
Near West Side 4
57
Lower West Side 3
53
Near West Side 5
52
Near West Side 3
54
Armour Square 1
50
Near West Side 2
53
Loop 1
54
Lower West Side 2
Nearby Cities
Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-07-21T22:04 UTC.