Emerald Hills

Monitoring Station · Redwood City, United States
17
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
18 7pm
17
17
17 10pm
17
17
17 1am
17
17
17 4am
17
17
29 7am
29
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— 10am
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— 1pm
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— 4pm
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Station readings
18
17
CAMS model adj -8
25
25
25
25
25
25
25
25
25
25
25
25
37
37

Air Quality Trend (24h)

PM2.54.0 µg/m³ ✓ WHO
Good

Nearby Monitoring Stations

18
Redwood City, San Mateo, California
6.5 km
17
Redwood City, San Mateo, California
6.5 km
17
Berkeley-Palo Alto
10.7 km PM2.5: 4.1 µg/m³
23
Acterra!
14.8 km PM2.5: 5.4 µg/m³
12
Parkside Intermediate School
22.3 km PM2.5: 3.0 µg/m³
83
Belle Air School
22.4 km PM2.5: 27.2 µg/m³
13
San Bruno School District Office
22.8 km PM2.5: 3.1 µg/m³
28
N Foothhill Blvd
22.9 km PM2.5: 6.6 µg/m³

Nearby Cities

14 Redwood City 12 San Carlos 12 Belmont 25 Menlo Park 25 Palo Alto 25 East Palo Alto 16 Foster City 12 San Mateo 25 Los Altos

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-09T22:19 UTC.