3312 Walnut St
Monitoring Station
· University City, United States
40
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading
Nearby Monitoring Stations
GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
Calibrated
36
3pm
36
40
35
6pm
35
35
35
9pm
35
35
48
12am
48
48
48
3am
48
48
—
6am
—
—
—
9am
—
—
—
12pm
—
—
Station readings
36
36
40
CAMS model
adj -2
37
37
37
37
37
37
37
37
37
50
50
50
50
50
50
Air Quality Trend (24h)
PM2.59.5 µg/m³
✓ WHO
Good
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Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-09T18:52 UTC.