Worst air pollution Presidio - San Francisco, today and tomorrow
Today (15 July): Air quality in Presidio 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 Presidio is medium. AQI improves to medium; 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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San Francisco's Presidio records excellent air quality, with the national park's 1,500 acres of coastal forest and headlands providing outstanding clean-air conditions directly exposed to Pacific Ocean airflows through the Golden Gate. This is consistently one of San Francisco's cleanest locations, with maritime air dominating conditions throughout most of the year.
Today - 15 July | Pollution peaks at 08:00
AQI:
Fair
39.4/100
PM2.5 (fine particles):
Good
13.6/100
PM10 (coarse particles):
Good
8.4/100
NO2 (nitrogen dioxide):
Good
4.4/100
O3 (ozone):
Fair
39.4/100
SO2 (sulfur dioxide):
Good
1.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.2/100
PM1 (ultrafine particles):
Good
7.5/100
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):
Good
18.9/100
PM10 (coarse particles):
Good
9.2/100
NO2 (nitrogen dioxide):
Good
9.5/100
O3 (ozone):
Medium
41.0/100
SO2 (sulfur dioxide):
Good
1.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.9/100
PM1 (ultrafine particles):
Good
12.5/100
Other Landmarks in San Francisco
Sports venues in San Francisco
Frequently Asked Questions
Is air quality bad in Presidio right now?
On 15 July 2026, overall air quality in Presidio 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 Presidio?
On 16 July 2026, air quality conditions in Presidio will be better than today, with AQI forecast at medium at 41.0/100. Pollution peaks around 10:00 AM (O3: 41.0/100).
When is air pollution at its worst in Presidio?
Presidio experiences the same seasonal air quality swings as the rest of San Francisco. Typically, spring typically offers the best combination of mild weather and clear air, while 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 Presidio 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.
Want to see air quality forecasts for other cities in United States?
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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