Harding ES (4431) Air Quality

Monitoring Station · Sylmar, United States
30
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
30 2pm
30
33
21 5pm
21
21
21 8pm
21
21
21 11pm
21
21
21 2am
21
21
— 5am
—
—
— 8am
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— 11am
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Station readings
30
30
CAMS model adj -33
66
66
66
54
54
54
54
54
54
54
54
54
54
54
54

Air Quality Forecast (24h)

PM2.57.1 µg/m³ ✓ WHO
Good
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Nearby Monitoring Stations

35
Gridley ES (4295)
1.1 km PM2.5: 8.3 µg/m³
39
Dyer ES (3493)
2.9 km PM2.5: 9.4 µg/m³
43
Sylmar Public Library - Outside
3.1 km PM2.5: 10.3 µg/m³
37
San Fernando MS (8358)
3.1 km PM2.5: 8.9 µg/m³
21
Sylmar Public Library - Inside
3.3 km PM2.5: 5.1 µg/m³
45
Maclay MS (8228)
3.9 km PM2.5: 10.8 µg/m³
35
Herrick Ave ES (4515)
4.5 km PM2.5: 8.4 µg/m³
48
North Valley Occupational Ctr (9329)
4.8 km PM2.5: 11.4 µg/m³

Nearby Cities

40 Sylmar 37 San Fernando 47 North Hills 21 Sunland 26 Tujunga 42 Valley Glen 36 Van Nuys 47 Northridge 40 Canyon Country

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-09-05T17:14 UTC.