Worst air pollution Santa Clara, today and tomorrow
Today (15 July): Air quality in Santa Clara is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (O3: 45.8/100).
Tomorrow (16 July 2026): Air quality in Santa Clara is medium. All pollutants stay as today. Pollution peaks around 9:00 AM (O3: 44.7/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Santa Clara's air quality reflects the Silicon Valley's partial topographic enclosure, with vehicle emissions from US-101 and semiconductor manufacturing contributing local sources. Bay Delta breezes provide afternoon ventilation, while summer wildfire smoke from surrounding Bay Area hills and the Santa Cruz Mountains is an increasingly frequent and severe seasonal concern.
Today - 15 July | Pollution peaks at 09:00
AQI:
Medium
45.8/100
PM2.5 (fine particles):
Good
14.1/100
PM10 (coarse particles):
Good
8.8/100
NO2 (nitrogen dioxide):
Good
6.1/100
O3 (ozone):
Medium
45.8/100
SO2 (sulfur dioxide):
Good
1.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.6/100
PM1 (ultrafine particles):
Good
8.6/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 09:00
AQI:
Medium
44.7/100
PM2.5 (fine particles):
Good
18.3/100
PM10 (coarse particles):
Good
9.2/100
NO2 (nitrogen dioxide):
Good
10.1/100
O3 (ozone):
Medium
44.7/100
SO2 (sulfur dioxide):
Good
1.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.2/100
PM1 (ultrafine particles):
Good
11.7/100
Pollen forecast in Santa Clara
View pollen forecastFrequently Asked Questions
Is air quality bad in Santa Clara right now?
On 15 July 2026, overall air quality in Santa Clara is medium. AQI is the main air quality indicator at 45.8/100. Pollution peaks around 9:00 AM (O3: 45.8/100).
Will air quality be worse tomorrow in Santa Clara?
On 16 July 2026, air quality conditions in Santa Clara will be similar to today, with AQI forecast at medium at 44.7/100. Pollution peaks around 9:00 AM (O3: 44.7/100).
When is air pollution at its worst in Santa Clara?
Santa Clara experiences a distinct seasonal swing in air quality, as winter rains provide the only real relief from an otherwise persistent haze; by contrast, from August into October, wildfire smoke can add sharp particulate spikes on top of the usual summer ozone. The mountains ringing the basin can trap pollution close to the ground for days when winds are calm.
Are air quality levels in Santa Clara based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app