Worst air pollution Milpitas, today and tomorrow
Today (15 July): Air quality in Milpitas is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 AM (O3: 39.4/100).
Tomorrow (16 July 2026): Air quality in Milpitas is fair. AQI improves to medium; PM2.5 increases to fair; NO2 increases to fair; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 10:00 AM (O3: 41.0/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Milpitas' air quality reflects the South San Francisco Bay position at the junction of the Bay and Silicon Valley, with vehicle emissions from I-880 and SR-237 and the surrounding semiconductor and technology manufacturing contributing local sources. The Bay Delta breeze provides afternoon ventilation, while the Calaveras Mountains and Diablo Range create topographic variation and summer wildfire smoke from surrounding East Bay and Mount Hamilton hills is an increasingly frequent seasonal concern.
Today - 15 July | Pollution peaks at 08:00
AQI:
Fair
39.4/100
PM2.5 (fine particles):
Good
16.9/100
PM10 (coarse particles):
Good
10.4/100
NO2 (nitrogen dioxide):
Good
10.8/100
O3 (ozone):
Fair
39.4/100
SO2 (sulfur dioxide):
Good
4.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.2/100
PM1 (ultrafine particles):
Good
9.3/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 10:00
AQI:
Medium
41.0/100
PM2.5 (fine particles):
Fair
23.0/100
PM10 (coarse particles):
Good
11.4/100
NO2 (nitrogen dioxide):
Fair
22.3/100
O3 (ozone):
Medium
41.0/100
SO2 (sulfur dioxide):
Good
4.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.9/100
PM1 (ultrafine particles):
Good
15.5/100
Pollen forecast in Milpitas
View pollen forecastFrequently Asked Questions
Is air quality bad in Milpitas right now?
On 15 July 2026, overall air quality in Milpitas is fair. AQI is the main air quality indicator at 39.4/100. Pollution peaks around 8:00 AM (O3: 39.4/100).
Will air quality be worse tomorrow in Milpitas?
On 16 July 2026, air quality conditions in Milpitas will be similar to today, with PM2.5 forecast at fair at 23.0/100. Pollution peaks around 10:00 AM (O3: 41.0/100).
When is air pollution at its worst in Milpitas?
Air quality in Milpitas shifts across the year: the cleanest air usually comes in winter, when storms periodically flush pollution out of the basin, but hot, sunny summer conditions drive persistent ozone problems, compounded by wildfire smoke risk into early autumn. Coastal breezes offer some relief compared to inland valley locations that see heavier smog buildup.
Are air quality levels in Milpitas 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