Grass Valley ES Air Quality
Monitoring Station
· San Leandro, United States
20
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading
Nearby Monitoring Stations
GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
Calibrated
20
11am
20
6
6
2pm
6
6
6
5pm
6
6
6
8pm
6
6
6
11pm
6
6
—
2am
—
—
—
5am
—
—
—
8am
—
—
Station readings
20
20
CAMS model
adj -21
34
34
27
27
27
27
27
27
27
27
27
27
27
27
27
Air Quality Forecast (24h)
PM2.54.7 µg/m³
✓ WHO
Good
Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-05-29T14:47 UTC.