Herrick Ave ES (4515)

Monitoring Station · Sylmar, United States
55
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
56 9pm
55
61
36 12am
36
23
36 3am
36
61
61 6am
61
61
61 9am
61
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— 12pm
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— 3pm
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— 6pm
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Station readings
56
55
CAMS model adj -14
75
75
75
50
50
37
50
50
75
75
75
75
75
75

Air Quality Trend (24h)

PM2.513.9 µg/m³ ✓ WHO
Moderate

Nearby Monitoring Stations

26
Sylmar Public Library - Inside
1.4 km PM2.5: 6.3 µg/m³
46
Sylmar Public Library - Outside
1.5 km PM2.5: 11.1 µg/m³
55
Dyer ES (3493)
2.3 km PM2.5: 13.9 µg/m³
54
Gridley ES (4295)
3.5 km PM2.5: 13.6 µg/m³
46
Van Gogh ES (7422)
4.0 km PM2.5: 11.0 µg/m³
49
Knollwood ES (4762)
4.2 km PM2.5: 11.8 µg/m³
54
North Valley Occupational Ctr (9329)
4.3 km PM2.5: 13.7 µg/m³
49
San Fernando MS (8358)
4.4 km PM2.5: 11.7 µg/m³

Nearby Cities

49 Sylmar 50 San Fernando 52 North Hills 45 Santa Clarita 52 Northridge 49 Canyon Country 43 Stevenson Ranch 50 Chatsworth 51 Reseda

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-10T00:06 UTC.