Gridley ES (4295)

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
55 9pm
54
59
34 12am
34
21
34 3am
34
59
59 6am
59
59
59 9am
59
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— 12pm
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—
— 3pm
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— 6pm
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Station readings
55
54
CAMS model adj -16
75
75
75
50
50
37
50
50
75
75
75
75
75
75

Air Quality Trend (24h)

PM2.513.6 µg/m³ ✓ WHO
Moderate

Nearby Monitoring Stations

58
Harding ES (4431)
1.1 km PM2.5: 15.3 µg/m³
55
Dyer ES (3493)
1.7 km PM2.5: 13.9 µg/m³
46
Sylmar Public Library - Outside
2.0 km PM2.5: 11.1 µg/m³
26
Sylmar Public Library - Inside
2.2 km PM2.5: 6.3 µg/m³
49
San Fernando MS (8358)
2.4 km PM2.5: 11.7 µg/m³
55
Herrick Ave ES (4515)
3.5 km PM2.5: 13.9 µg/m³
54
North Valley Occupational Ctr (9329)
3.8 km PM2.5: 13.7 µg/m³
58
Maclay MS (8228)
4.1 km PM2.5: 15.2 µg/m³

Nearby Cities

49 Sylmar 50 San Fernando 52 North Hills 51 Sunland 52 Northridge 50 Van Nuys 50 Valley Glen 49 Canyon Country 51 Tujunga

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-10T00:00 UTC.