Harding ES (4431) Air Quality
Monitoring Station
· Sylmar, United States
51
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Last Reading
Nearby Monitoring Stations
GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
Calibrated
54
12am
51
57
57
3am
57
57
57
6am
57
57
57
9am
69
69
69
12pm
69
69
—
3pm
—
—
—
6pm
—
—
—
9pm
—
—
Station readings
54
51
CAMS model
adj +3
54
54
54
54
54
54
54
54
54
54
66
66
66
66
66
Air Quality Forecast (24h)
PM2.512.3 µg/m³
✓ WHO
Moderate
Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-06-09T03:52 UTC.