N 9th St Air Quality
Monitoring Station
· Center City, United States
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading
Nearby Monitoring Stations
GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
25
6pm
25
25
25
9pm
25
25
27
12am
34
27
27
3am
27
25
25
6am
25
25
—
9am
—
—
—
12pm
—
—
—
3pm
—
—
Station readings
25
25
CAMS model
25
25
25
25
25
25
27
34
27
27
27
25
25
25
25
Air Quality Forecast (24h)
PM2.56.0 µg/m³
✓ WHO
Good
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26
1401 John F Kennedy Blvd
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23
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22
1901 Walnut St
25
2100 Pine St
15
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24
S Christopher Columbus Blvd
Nearby Cities
Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-09-05T21:34 UTC.