Thornhill ES Air Quality
Monitoring Station
· Orinda, United States
18
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading
Nearby Monitoring Stations
GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
Calibrated
18
12am
18
24
24
3am
24
17
17
6am
17
17
24
9am
24
17
17
12pm
17
17
—
3pm
—
—
—
6pm
—
—
—
9pm
—
—
Station readings
18
18
CAMS model
adj -10
27
34
34
34
34
27
27
27
27
34
34
27
27
27
27
Air Quality Forecast (24h)
PM2.54.4 µg/m³
✓ WHO
Good
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20
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19
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17
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22
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22
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21
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20
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19
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Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-06-09T03:40 UTC.