Redwood City, San Mateo, California Air Quality
Monitoring Station
· Redwood City, United States
70
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Last Reading
Nearby Monitoring Stations
GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
Calibrated
99
6pm
67
78
70
9pm
67
74
74
12am
74
74
74
3am
74
74
74
6am
74
74
—
9am
—
—
—
12pm
—
—
—
3pm
—
—
Station readings
99
78
70
CAMS model
adj +40
27
27
27
27
27
34
34
34
34
34
34
34
34
34
34
Air Quality Forecast (24h)
PM2.521.1 µg/m³
×1.4 WHO
Moderate
Nearby Monitoring Stations
57
Redwood City, San Mateo, California
23
Berkeley-Palo Alto
24
Emerald Hills
26
Acterra!
24
N Foothhill Blvd
20
Environment Education Center
28
JFK Middle School
26
Belle Air School
Nearby Cities
Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-07-21T21:53 UTC.