Harding ES (4431)

Monitoring Station · Sylmar, United States
40
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
52 12am
49
40
42 3am
42
67
67 6am
67
67
67 9am
67
67
67 12pm
67
67
— 3pm
—
—
— 6pm
—
—
— 9pm
—
—
Station readings
52
49
40
CAMS model adj -8
50
50
37
50
50
75
75
75
75
75
75
75
75
75
75

Air Quality Trend (24h)

PM2.59.6 µg/m³ ✓ WHO
Good

Nearby Monitoring Stations

32
Gridley ES (4295)
1.1 km PM2.5: 7.7 µg/m³
34
Dyer ES (3493)
2.9 km PM2.5: 8.1 µg/m³
29
Sylmar Public Library - Outside
3.1 km PM2.5: 7.0 µg/m³
40
San Fernando MS (8358)
3.1 km PM2.5: 9.7 µg/m³
20
Sylmar Public Library - Inside
3.3 km PM2.5: 4.8 µg/m³
48
Maclay MS (8228)
3.9 km PM2.5: 11.6 µg/m³
29
Herrick Ave ES (4515)
4.5 km PM2.5: 7.0 µg/m³
43
North Valley Occupational Ctr (9329)
4.8 km PM2.5: 10.4 µg/m³

Nearby Cities

38 Sylmar 39 San Fernando 41 North Hills 40 Sunland 40 Tujunga 40 Valley Glen 40 Van Nuys 40 Northridge 37 Canyon Country

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-10T03:35 UTC.