3312 Walnut St Air Quality
Monitoring Station
· University City, United States
53
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Last Reading
Nearby Monitoring Stations
GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
Calibrated
51
5pm
52
53
36
8pm
36
36
36
11pm
36
36
36
2am
36
36
36
5am
36
36
—
8am
—
—
—
11am
—
—
—
2pm
—
—
Station readings
51
52
53
CAMS model
adj +9
34
34
27
27
27
27
27
27
27
27
27
27
27
27
27
Air Quality Forecast (24h)
PM2.513.0 µg/m³
✓ WHO
Moderate
Nearby Monitoring Stations
47
4110 Market St
52
2100 Pine St
46
1901 Walnut St
50
N 34th St & Mantua Ave
54
Stinger Square Park
52
315 N 18th St
53
1401 John F Kennedy Blvd
48
1501 Point Breeze Ave
Nearby Cities
Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-07-21T20:48 UTC.