Worst air pollution Golden Gate Bridge - San Francisco, today and tomorrow
Today (15 July): Air quality in Golden Gate Bridge 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 Golden Gate Bridge 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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San Francisco's Golden Gate Bridge air quality benefits from the Golden Gate's extraordinary Pacific Ocean wind corridor, with the Pacific's powerful onshore breezes channelled through the gap creating some of the Bay Area's most powerful and consistent natural ventilation. Vehicle traffic on the bridge deck generates localised NOₓ from the span's concentrated traffic, while the extraordinary maritime wind corridor and the open bay and ocean exposure generally maintain outstanding conditions away from the immediate traffic lanes throughout most of the year.
Today - 15 July | Pollution peaks at 09:00
AQI:
Fair
37.9/100
PM2.5 (fine particles):
Good
10.7/100
PM10 (coarse particles):
Good
6.8/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
37.9/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
1.8/100
PM1 (ultrafine particles):
Good
5.8/100
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
16.1/100
PM10 (coarse particles):
Good
7.7/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Medium
40.2/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
1.7/100
PM1 (ultrafine particles):
Good
10.7/100
Other Landmarks in San Francisco
Sports venues in San Francisco
Frequently Asked Questions
Is air quality bad in Golden Gate Bridge right now?
On 15 July 2026, overall air quality in Golden Gate Bridge 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 Golden Gate Bridge?
On 16 July 2026, air quality conditions in Golden Gate Bridge 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 Golden Gate Bridge?
Golden Gate Bridge's air quality follows a clear seasonal pattern. Typically, winter storms periodically reset air quality, keeping the cleanest stretch to the rainy months, while wildfire smoke season from July through October is the dominant concern, sometimes overwhelming other pollution sources for days at a time. Wine country and inland valley locations tend to see more smoke buildup than the immediate coast.
Are air quality levels in Golden Gate Bridge 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