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
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—
— 6pm
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— 9pm
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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
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Nearby Monitoring Stations

44
Gridley ES (4295)
1.1 km PM2.5: 10.5 µg/m³
47
Dyer ES (3493)
2.9 km PM2.5: 11.2 µg/m³
40
Sylmar Public Library - Outside
3.1 km PM2.5: 9.6 µg/m³
41
San Fernando MS (8358)
3.1 km PM2.5: 9.8 µg/m³
26
Sylmar Public Library - Inside
3.3 km PM2.5: 6.2 µg/m³
48
Maclay MS (8228)
3.9 km PM2.5: 11.5 µg/m³
45
Herrick Ave ES (4515)
4.5 km PM2.5: 10.8 µg/m³
44
North Valley Occupational Ctr (9329)
4.8 km PM2.5: 10.5 µg/m³

Nearby Cities

39 Sylmar 41 San Fernando 42 North Hills 31 Sunland 35 Tujunga 41 Valley Glen 39 Van Nuys 40 Northridge 43 Canyon Country

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-06-09T03:52 UTC.