Emerald Hills

Monitoring Station · Redwood City, United States
15
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
17 8pm
15
15
15 11pm
15
15
15 2am
15
15
15 5am
15
27
27 8am
27
—
— 11am
—
—
— 2pm
—
—
— 5pm
—
—
Station readings
17
15
CAMS model adj -10
25
25
25
25
25
25
25
25
25
25
25
37
37
37

Air Quality Trend (24h)

PM2.53.7 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
18
Redwood City, San Mateo, California
6.5 km
14
Berkeley-Palo Alto
10.7 km PM2.5: 3.3 µg/m³
18
Acterra!
14.8 km PM2.5: 4.2 µg/m³
12
Parkside Intermediate School
22.3 km PM2.5: 3.0 µg/m³
84
Belle Air School
22.4 km PM2.5: 28.0 µg/m³
13
San Bruno School District Office
22.8 km PM2.5: 3.1 µg/m³

Nearby Cities

14 Redwood City 12 San Carlos 12 Belmont 21 Menlo Park 21 Palo Alto 21 East Palo Alto 15 Foster City 13 San Mateo 22 Los Altos

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-09T23:26 UTC.