Worst air pollution Berkeley, today and tomorrow
Today (15 July): Air quality in Berkeley is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (O3: 37.9/100).
Tomorrow (16 July 2026): Air quality in Berkeley is medium. AQI improves to medium; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 10:00 AM (O3: 40.2/100). 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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Berkeley's air quality reflects the East Bay Hills' partial enclosure, with vehicle emissions from I-80 and SR-13 and UC Berkeley campus contributing local sources alongside elevated PM2.5 from Oakland Port's diesel freight traffic. Bay Delta breezes provide afternoon ventilation, while wildfire smoke from surrounding East Bay hills is an increasingly frequent seasonal concern.
Today - 15 July | Pollution peaks at 09:00
AQI:
Fair
37.9/100
PM2.5 (fine particles):
Good
12.0/100
PM10 (coarse particles):
Good
7.5/100
NO2 (nitrogen dioxide):
Good
3.2/100
O3 (ozone):
Fair
37.9/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.8/100
PM1 (ultrafine particles):
Good
6.5/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 10:00
AQI:
Medium
40.2/100
PM2.5 (fine particles):
Good
17.9/100
PM10 (coarse particles):
Good
8.6/100
NO2 (nitrogen dioxide):
Good
7.1/100
O3 (ozone):
Medium
40.2/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.7/100
PM1 (ultrafine particles):
Good
11.9/100
Pollen forecast in Berkeley
View pollen forecastFrequently Asked Questions
Is air quality bad in Berkeley right now?
On 15 July 2026, overall air quality in Berkeley is fair. AQI is the main air quality indicator at 37.9/100. Pollution peaks around 9:00 AM (O3: 37.9/100).
Will air quality be worse tomorrow in Berkeley?
On 16 July 2026, air quality conditions in Berkeley will be better than today, with AQI forecast at medium at 40.2/100. Pollution peaks around 10:00 AM (O3: 40.2/100).
When is air pollution at its worst in Berkeley?
Like most US cities, Berkeley sees air quality shift from season to season, as the rainy winter months generally bring the cleanest air, as storms clear traffic and woodsmoke pollution; by contrast, heat and dryness combine from July onward to raise both ozone and smoke risk. Wine country and inland valley locations tend to see more smoke buildup than the immediate coast.
Are air quality levels in Berkeley 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