Harding ES (4431) Air Quality

Monitoring Station · Sylmar, United States
54
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
57 11pm
54
58
58 2am
58
58
58 5am
58
58
58 8am
58
70
70 11am
70
70
— 2pm
—
—
— 5pm
—
—
— 8pm
—
—
Station readings
57
54
CAMS model adj +4
54
54
54
54
54
54
54
54
54
54
54
66
66
66
66

Air Quality Forecast (24h)

PM2.513.5 µg/m³ ✓ WHO
Moderate
View city history →

Nearby Monitoring Stations

48
Gridley ES (4295)
1.1 km PM2.5: 11.6 µg/m³
52
Dyer ES (3493)
2.9 km PM2.5: 12.7 µg/m³
43
Sylmar Public Library - Outside
3.1 km PM2.5: 10.4 µg/m³
46
San Fernando MS (8358)
3.1 km PM2.5: 11.1 µg/m³
27
Sylmar Public Library - Inside
3.3 km PM2.5: 6.5 µg/m³
51
Maclay MS (8228)
3.9 km PM2.5: 12.2 µg/m³
51
Herrick Ave ES (4515)
4.5 km PM2.5: 12.3 µg/m³
49
North Valley Occupational Ctr (9329)
4.8 km PM2.5: 11.8 µg/m³

Nearby Cities

42 Sylmar 46 San Fernando 46 North Hills 34 Sunland 38 Tujunga 44 Valley Glen 42 Van Nuys 42 Northridge 39 Canyon Country

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-06-09T02:42 UTC.