Colfax-City Hall, Placer, California Air Quality

Monitoring Station · Granite Bay, United States
71
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
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Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
57 12am
55
57
57 3am
64
64
64 6am
64
64
84 9am
84
84
84 12pm
64
64
— 3pm
—
—
— 6pm
—
—
— 9pm
—
—
CAMS model adj +30
27
25
27
27
34
34
34
34
34
54
54
54
54
34
34

Air Quality Forecast (24h)

PM2.521.6 µg/m³ ×1.4 WHO
Moderate
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Nearby Monitoring Stations

34
Auburn-11645 Atwood Road, Placer, California
22.2 km PM2.5: 8.2 µg/m³
44
Auburn-11645 Atwood Road, Placer, California
22.2 km PM2.5: 10.6 µg/m³

Nearby Cities

28 Granite Bay 22 Rocklin 32 El Dorado Hills 32 Cameron Park 32 Folsom 28 Linda 24 Citrus Heights 28 Orangevale 23 Antelope

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-05-31T03:58 UTC.