Harding ES (4431)

Monitoring Station · Sylmar, United States
60
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
65 7pm
60
60
60 10pm
60
35
35 1am
22
35
35 4am
60
60
60 7am
60
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— 10am
—
—
— 1pm
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—
— 4pm
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Station readings
65
60
CAMS model adj -15
75
75
75
75
75
50
50
37
50
50
75
75
75
75

Air Quality Trend (24h)

PM2.516.6 µg/m³ ×1.1 WHO
Moderate

Nearby Monitoring Stations

56
Gridley ES (4295)
1.1 km PM2.5: 14.6 µg/m³
57
Dyer ES (3493)
2.9 km PM2.5: 14.9 µg/m³
49
Sylmar Public Library - Outside
3.1 km PM2.5: 11.7 µg/m³
54
San Fernando MS (8358)
3.1 km PM2.5: 13.3 µg/m³
28
Sylmar Public Library - Inside
3.3 km PM2.5: 6.6 µg/m³
60
Maclay MS (8228)
3.9 km PM2.5: 16.2 µg/m³
57
Herrick Ave ES (4515)
4.5 km PM2.5: 14.8 µg/m³
57
North Valley Occupational Ctr (9329)
4.8 km PM2.5: 14.8 µg/m³

Nearby Cities

52 Sylmar 52 San Fernando 54 North Hills 54 Sunland 54 Tujunga 54 Valley Glen 54 Van Nuys 54 Northridge 53 Canyon Country

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-09T22:16 UTC.