Worst air pollution Lombard Street - San Francisco, today and tomorrow
Today (15 July): Air quality in Lombard Street 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 Lombard Street 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: 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 Lombard Street air quality reflects the Russian Hill steep winding block's position, with vehicle traffic on the famous 8-curve block and the surrounding dense residential character contributing concentrated vehicle NOₓ from the slow-moving tourist traffic on the famous curves. The elevated hillside position provides some additional dispersal compared to the flat valley floor, while the fog and sea breezes provide background ventilation and Lombard Street generally maintains moderate San Francisco urban readings throughout most of the year.
Today - 15 July | Pollution peaks at 09:00
AQI:
Fair
37.9/100
PM2.5 (fine particles):
Good
15.6/100
PM10 (coarse particles):
Good
9.9/100
NO2 (nitrogen dioxide):
Good
12.8/100
O3 (ozone):
Fair
37.9/100
SO2 (sulfur dioxide):
Good
4.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.8/100
PM1 (ultrafine particles):
Good
8.4/100
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):
Fair
23.0/100
PM10 (coarse particles):
Good
11.2/100
NO2 (nitrogen dioxide):
Fair
26.1/100
O3 (ozone):
Medium
40.2/100
SO2 (sulfur dioxide):
Good
4.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.7/100
PM1 (ultrafine particles):
Good
15.6/100
Other Landmarks in San Francisco
Sports venues in San Francisco
Frequently Asked Questions
Is air quality bad in Lombard Street right now?
On 15 July 2026, overall air quality in Lombard Street 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 Lombard Street?
On 16 July 2026, air quality conditions in Lombard Street will be similar to today, with NO2 forecast at fair at 26.1/100. Pollution peaks around 10:00 AM (O3: 40.2/100).
When is air pollution at its worst in Lombard Street?
At Lombard Street, air quality tends to follow San Francisco's broader seasonal rhythm. In short, late winter and spring tend to have the cleanest conditions, once winter rains settle in, whereas the long dry stretch from midsummer into autumn brings both ozone and wildfire smoke risk. Dry summer conditions with virtually no rain mean pollution and smoke can linger for extended stretches once they arrive.
Are air quality levels in Lombard Street 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