Gridley ES (4295)

Monitoring Station · Sylmar, United States
56
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
61 7pm
56
55
55 10pm
55
30
30 1am
17
30
30 4am
55
55
55 7am
55
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— 10am
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— 1pm
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— 4pm
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Station readings
61
56
CAMS model adj -20
75
75
75
75
75
50
50
37
50
50
75
75
75
75

Air Quality Trend (24h)

PM2.514.6 µg/m³ ✓ WHO
Moderate

Nearby Monitoring Stations

60
Harding ES (4431)
1.1 km PM2.5: 16.6 µg/m³
57
Dyer ES (3493)
1.7 km PM2.5: 14.9 µg/m³
49
Sylmar Public Library - Outside
2.0 km PM2.5: 11.7 µg/m³
28
Sylmar Public Library - Inside
2.2 km PM2.5: 6.6 µg/m³
54
San Fernando MS (8358)
2.4 km PM2.5: 13.3 µg/m³
57
Herrick Ave ES (4515)
3.5 km PM2.5: 14.8 µg/m³
57
North Valley Occupational Ctr (9329)
3.8 km PM2.5: 14.8 µg/m³
60
Maclay MS (8228)
4.1 km PM2.5: 16.2 µg/m³

Nearby Cities

52 Sylmar 52 San Fernando 54 North Hills 54 Sunland 54 Northridge 54 Van Nuys 54 Valley Glen 53 Canyon Country 54 Tujunga

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-09T22:17 UTC.