Redwood City, San Mateo, California Air Quality

Monitoring Station · Redwood City, United States
57
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
51 6pm
56
57
56 9pm
56
63
63 12am
63
63
63 3am
63
63
63 6am
63
63
— 9am
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—
— 12pm
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— 3pm
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Station readings
51
57
CAMS model adj +29
27
27
27
27
27
34
34
34
34
34
34
34
34
34
34

Air Quality Forecast (24h)

PM2.515.0 µg/m³ ✓ WHO
Moderate
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Nearby Monitoring Stations

70
Redwood City, San Mateo, California
0.0 km PM2.5: 21.1 µg/m³
23
Berkeley-Palo Alto
5.9 km PM2.5: 5.4 µg/m³
24
Emerald Hills
6.5 km PM2.5: 5.8 µg/m³
26
Acterra!
10.5 km PM2.5: 6.2 µg/m³
24
N Foothhill Blvd
21.4 km PM2.5: 5.8 µg/m³
20
Environment Education Center
22.6 km PM2.5: 4.7 µg/m³
28
JFK Middle School
23.4 km PM2.5: 6.7 µg/m³
26
Belle Air School
23.7 km PM2.5: 6.3 µg/m³

Nearby Cities

28 Redwood City 26 Menlo Park 27 San Carlos 23 East Palo Alto 23 Palo Alto 27 Belmont 28 Foster City 25 Los Altos 28 San Mateo

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-07-21T21:52 UTC.